Alliance Laundry Systems CU025N, DR25G2, CHD25G2-CA025L, GA030L, GT035N Troubleshooting Manual

Drying Tumblers

S TART

2 5

C

H I G H T E M P

M E D T E M P

L O W T E M P

N O H E A T

1

2

3

S E L E

C T

T E M P

I N S E R T

C O I N

P U S H S T A R

T

25 Pound Capacity 30 Pound Capacity 35 Pound Capacity 55 Pound Capacity

Starting Serial No. 0602004144

Refer to Page 7 for Model Numbers

Troubleshooting

www.comlaundry.com

Part No. 70380601R3

September 2009

Table of

Content s

Section 1 – Safety Information .......................................................... 4

Locating an Authorized Service Person ............................................... 6

Safety Warnings and Decals................................................................. 6

Safety Precautions for Servicing Tumblers.......................................... 6

Section 2 – Introduction..................................................................... 7

Model Identification ............................................................................. 7

Serial Plate Location ............................................................................. 9

Customer Service.................................................................................. 9

Wiring Diagram............................................................................... ..... 9

How a Tumbler Works ......................................................................... 10

Section 3 – Troubleshooting............................................................... 11

1. Tumbler Does Not Start........................................................... 12

2. Motor Does Not Start............................................................... 13

3. Motor Overload Protector Cycles Repeatedly......................... 14

4. Motor Runs But Cylinder Does Not Turn................................ 15

5. Motor Does Not Stop............................................................... 16

6. Burner Does Not Ignite............................................................ 17

7. Burner Ignites and Goes Out Repeatedly................................. 20

8. Burner Does Not Shut Off ....................................................... 21

9. Clothes Do Not Dry ................................................................. 22

10. Tumbler Overheating............................................................... 24

11. Burner Not Burning Properly................................................... 25

12. Loading Door Opens During Operation................................... 26

13. Cylinder Continues to Spin with Door Open........................... 27

14. Coin Does Not Fall into Coin Vault or Coin Drop Sensor Does Not Register that Coin Has Been Entered28

Section 4 – Adjustments..................................................................... 29

15. Loading Door Switch............................................................... 29

16. Loading Door Strike................................................................. 29

Section 5 – Micro Display Control (MDC) Troubleshooting.......... 30

Models with BC, BL, BX and BY Control Suffixes

17. Coins Ignored When Entered................................................... 30

18. Control Has No Display........................................................... 31

19. Door Open Indicator ................................................................ 33

20. Motor Will Not Start/Run........................................................ 35

21. Unit Will Not Heat – Gas......................................................... 39

22. Unit Will Not Heat – Steam..................................................... 42

23. Unit Will Not Heat – Electric .................................................. 45

24. Error Codes.............................................................................. 48

Gas and Steam Models

Control Circuit Schematic.................................. ..... .... ..... .................49

Control Circuit Connection...............................................................50

Gas and Steam Models

Control Box Schematic............................. ..... .... ...............................51

Control Box Connection ...................................................................52

the expressed written consent of the publisher.

70380601 1

Gas and Steam Models

Control Circuit Schematic.................................. ..... .... ..... .................53

Gas and Steam Models

Control Circuit Schematic.................................. ..... .... ..... .................54

Gas and Steam Models

Control Box Schematic............................. ..... .... ...............................55

Control Box Connection ...................................................................56

Electric Models

Control Circuit Schematic.................................. ..... .... ..... .................57

Control Circuit Connection...............................................................58

Electric Models

Control Box Connection ...................................................................59

Control Box Schematic............................. ..... .... ...............................60

Section 6 – NetMaster Troubleshooting ........................................... 61

Models with NC, NR, NX, NY, ZC, ZR, ZX and ZY

Control Suffixes

25. No Infra-red (IR) Communication........................................... 61

26. Coins Ignored When Entered................................................... 62

27. Control Has No Display........................................................... 63

28. Door Open Indicator ................................................................ 65

29. Motor Will Not Start/Run........................................................ 67

30. Unit Will Not Heat – Gas......................................................... 71

31. Unit Will Not Heat – Steam..................................................... 74

Section 7 – Hybrid Timer Control Troubleshooting....................... 76

Models with QT, SD and SX Control Suffixes

32. Coins Ignored When Entered................................................... 76

33. Control Has No Display – OPL Models .................................. 77

34. Display Flashes “dr” With Door Closed – OPL Models ......... 80

35. Vend Satisfied, No In Use LED – Coin Models...................... 83

36. In Use LED Lit, No Motor Run – Coin Models...................... 87

37. Motor Will Not Start/Run – Coin Models ............................... 90

38. Motor Will Not Start/Run – OPL Models................................ 93

39. Unit Will Not Heat – Gas – Coin Models................................ 96

40. Unit Will Not Heat – Gas – OPL Models................................ 99

41. Unit Will Not Heat – Electric OPL.......................................... 102

42. Error Codes.............................................................................. 106

Section 8 – On Premise Micro Control Troubleshooting................ 107

Models with OM Control Suffix

43. Control Has No Display........................................................... 108

44. Door Open Indicator ................................................................ 110

45. Motor Will Not Start/Run........................................................ 113

46. Unit Will Not Heat – Gas......................................................... 116

47. Unit Will Not Heat – Steam..................................................... 119

48. Unit Will Not Heat – Electric .................................................. 122

49. Error Codes.............................................................................. 125

2 70380601

Section 9 – Quantum Control Troubleshooting ............................... 126

Models with LC, LX, LY, WC, WX and WY Control Suffixes

50. No Infrared Communication.................................................... 127

51. Coins Ignored When Entered................................................... 128

52. No Display ............................................................................... 129

53. “Door Open” Indicator............................................................. 131

54. No Start/Run ............................................................................ 133

55. Unit Will Not Heat – Gas......................................................... 135

56. Unit Will Not Heat – Steam..................................................... 138

57. Unit Will Not Heat – Electric .................................................. 140

58. CE Models No Display............................................................ 143

59. CE Models “Door Open” Indicator.......................................... 145

60. CE Models No Start/Run ......................................................... 147

61. CE Models Will Not Heat – Gas/Steam................................... 149

62. CE Models Will Not Heat – Electric ....................................... 152

70380601 3

Section 1

Danger indicates an imminently hazardous situation that, if not avoided, will cause severe personal injury or death.

DANGER

Warning indicates a hazardous situation that, if not avoided, could cause severe personal injury or death.

WARNING

Caution indicates a hazardous situation that, if not avoided, may cause minor or moderate personal injury or property damage.

CAUTION

• Failure to install, maintain and/or operate this product according to the manufacturer’s instructions may result in conditions which can produce serious injury, death and/or property damage.

• Do not repair or replace any part of the product or attempt any servicing unless specifically recommended or published in this Service Manual and unless you understand and have the skills to carry out the servicing.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the product is properly grounded and to reduce the risk of fire, electric shock, serious injury or death.

W006R2

WARNING

Safety Information

Throughout this manual and on machine decals, you will find precautionary statements (“CAUTION”, “WARNING”, and “DANGER”) followed by specific instructions. These precautions are intended for the personal safety of the operator, user, servicer, and those maintaining the machine.

Additional precautionary statements (“IMPORTANT” and “NOTE”) are followed by specific instructions.

IMPORTANT: The word “IMPORTANT” is used

to inform the reader of specific procedures where minor machine damage will occur if the procedure is not followed.

NOTE: The word “NOTE” is used to communicate installation, operation, maintenance or servicing information that is important but not hazard related.

In the interest of safety, some general precautions relating to the operation of this machine follow.

4 70380601

Safety Information

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Never start the tumbler with any guards/ panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W240

WARNING

Repairs that are made to your products by unqualified persons can result in hazards due to improper assembly or adjustments subjecting you, or the inexperienced person making such repairs, to the risk of serious injury, electrical shock, or death.

W007

WARNING

If you or an unqualified person perform service on your product, you must assume the responsibility for any personal injury or property damage which may result. The manufacturer will not be responsible for any injury or property damage arising from improper service and/or service procedures.

W008

CAUTION

IMPORTANT INFORMATION: During the lifetime of a tumbler, it may require service. The information contained in this manual was written and is intended for use by qualified service technicians who are familiar with the safety procedures required in the repair of a tumbler, and who are equipped with the proper tools and testing equipment.

NOTE: The WARNING and IMPORTANT instructions appearing in this manual are not meant to cover all possible conditions and situations that may occur. It must be understood that common sense, caution and carefulness are factors which CANNOT be built into this tumbler. These factors MUST BE supplied by the person(s) installing, maintaining or operating the tumbler.

Always contact your dealer, distributor, service agent or the manufacturer on any problems or conditions you do not understand.

70380601 5

Safety Information

Locating an Authorized Service Person

Alliance Laundry Systems is not responsible for personal injury or property damage resulting from improper service. Review all service information before beginning repairs.

Warranty service must be performed by an authorized technician, using authorized factory parts. If service is required after the warranty expires, Alliance Laundry Systems also recommends contacting an authorized technician and using authorized factory parts.

Safety Warnings and Decals

SAFETY WARNINGS and decals have been provided in key locations to remind you of important precautions for the safe operation and maintenance of your tumbler. Please take the time to review these warnings before proceeding with service work.

All decals have been designed and applied to withstand washing and cleaning. Decals should be checked periodically to be sure they have not been damaged, removed, or painted.

Safety Precautions for Servicing Tumblers

Prior to servicing tumbler:

• Disconnect electrical service and “lockout” to prevent unintentional connection.

• Shut off supply gas valve.

• Allow machine to cool prior to servicing.

After servicing tumbler:

• Control/access panels must be reinstalled.

• Motor/drive/belt guards must be reinstalled.

• Contactor/junction/accessory box covers must

be reinstalled.

• Use a non-corrosive leak detection solution to check all pipe connections for gas leaks. DO NOT USE AN OPEN FLAME TO CHECK FOR GAS LEAKS!

• The loading door switch, lint door switch and airflow switch must be operating properly.

6 70380601

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models:

Gas Steam Electric

CHD25G2-CA025L CHD25G2-CA025N CHD25G2-CT025L CHD25G2-CT025N CHD25G2-CU025L CHD25G2-CU025N DR25G2-BA025L DR25G2-BA025N DR25G2-BT025L

25

Pound

30

Pound

DR25G2-BT025N DR25G2-BU025L DR25G2-BU025N GA025L GA025N GT025L GT025N GU025L GU025N HA025L HA025N

CHD30G2-CA030L CHD30G2-CA030N CHD30G2-CT030L CHD30G2-CT030N CHD30G2-CU030L CHD30G2-CU030N DR30G2-BA030L DR30G2-BA030N DR30G2-BT030D DR30G2-BT030L DR30G2-BT030N DR30G2-BU030L DR30G2-BU030N GA030L GA030N GT030L GT030N GU030L GU030N

Models continued on next page.

HT025L HT025N HU025L HU025N IPD25G2-IT025L IPD25G2-IT025N KA025L KA025N KT025L KT025N KU025L KU025N LA025L LA025N LT025L LT025N LU025L LU025N PA025L

HA030L HA030N HT030D HT030L HT030N HU030L HU030N IPD30G2-IT030L IPD30G2-IT030N KT030L KT030N LA030L LA030N LT030L LT030N LU030L LU030N PA030L PA030N

PA025N PT025L PT025N PU025L PU025N SA025L SA025N ST025L ST025N SU025L SU025N UA025L UA025N UT025L UT025N UU025L UU025N YT025L YT025N

PT030L PT030N PU030L PU030N SA030L SA030N ST030D ST030L ST030N SU030L SU030N UA030L UA030N UT030L UT030N UU030L UU030N YT030L YT030N

CHD25S2-CT025S CHD25S2-CU025S DR25S2-BT025S DR25S2-BU025S GT025S GU025S HT025S HU025S IPD25S2-IT025S KT025S KU025S LT025S LU025S PT025S PU025S ST025S SU025S UT025S UU025S YT025S

CHD30S2-CT030S CHD30S2-CU030S DR30S2-BT030S DR30S2-BU030S GT030S GU030S HT030S HU030S IPD30S2-IT030S KT030S LT030S LU030S PT030S PU030S ST030S SU030S UT030S UU030S YT030S

CHD25E2-CT025E CHD25E2-CU025E DR25E2-BT025E DR25E2-BU025E GT025E GU025E HT025E HU025E IPD25E2-IT025E KT025E KU025E LT025E LU025E PT025E PU025E ST025E SU025E UT025E UU025E YT025E

CHD30E2-CT030E CHD30E2-CU030E DR30E2-BT030E DR30E2-BU030E GT030E GU030E HT030E HU030E IPD30E2-IT030E KT030E LT030E LU030E PT030E PU030E ST030E SU030E UT030E UU030E YT030E

70380601 7

Introduction

35

Pound

55

Pound

AT035L AT035N CHD35G2-CA035L CHD35G2-CA035N CHD35G2-CT035L CHD35G2-CT035N CHD35G2-CU035L CHD35G2-CU035N DR35G2-BA035L DR35G2-BA035N DR35G2-BT035L DR35G2-BT035N DR35G2-BU035L DR35G2-BU035N GA035L GA035N GT035L GT035N GU035L GU035N

CA055L CA055N CT055L CT055N CU055L CU055N GT055L GT055N HA055L HA055N HT055D

Gas Steam Electric

HA035L HA035N HT035L HT035N HU035L HU035N IPD35G2-IT035L IPD35G2-IT035N KA035L KA035N KT035L KT035N KU035L KU035N LA035L LA035N LT035L LT035N LU035L LU035N

HT055L HT055N HU055L HU055N IPD55G2-IT055L IPD55G2-IT055N KT055L KT055N SA055L SA055N ST055D

PA035L PA035N PT035L PT035N PU035L PU035N SA035L SA035N ST035L ST035N SU035L SU035N UA035L UA035N UT035L UT035N UU035L UU035N YT035L YT035N

ST055L ST055N SU055L SU055N UA055L UA055N UT055L UT055N UU055L UU055N

AT035S CHD35S2-CT035S CHD35S2-CU035S DR35S2-BT035S DR35S2-BU035S GT035S GU035S HT035S HU035S IPD35S2-IT035S KT035S KU035S LT035S LU035S PT035S PU035S ST035S SU035S UT035S UU035S YT035S YU035S

Not

Applicable

AT035E CHD35E2-CT035E CHD35E2-CU035E DR35E2-BT035E DR35E2-BU035E GT035E GU035E HT035E HU035E IPD35E2-IT035E KT035E KU035E LT035E LU035E PT035E PU035E ST035E SU035E UT035E UU035E YT035E YU035E

CT055E CU055E GT055E HT055E HU055E IPD55E2-IT055E KT055E ST055E SU055E UT055E UU055E

Includes models with the following control suffixes:

3O – DX4 OPL LC – network adaptable coin SX – single drop, prep for coin 3V – DX4 vended LX – network adaptable, prep for coin WC – network ready coin 3X – DX4 prep for coin LY – network adaptable, prep for card WX – network ready, prep for coin BC – basic electronic, coin NC – NetMaster coin WY – network ready, prep for card BL – basic electronic, central pay NR – NetMaster card ZC – NetMaster network coin BX – basic electronic, prep for coin NX – NetMaster, prep for coin ZR – NetMaster network card BY – basic electronic, prep for card NY – NetMaster, prep for card ZX – NetMaster network, prep for coin DO – DMP OPL OM – OPL micro ZY – NetMaster network, prep for card DV – DMP vended QT – dual digital timer DX – DMP prep for coin SD – single drop

8 70380601

Serial Plate Location

1

When calling or writing about your product, be sure to mention model and serial numbers. Model and serial numbers are located on serial plate as shown.

Introduction

1 Serial Plate

Customer Service

If literature or replacement parts are required, contact the source from which the machine was purchased or contact Alliance Laundry Systems at (920) 748-3950 for the name and address of the nearest authorized parts distributor.

For technical assistance, call (920) 748-3121.

Wiring Diagram

The wiring diagram is located inside the contactor or junction box.

The wiring diagram part number is located in the lower portion of the electrical data on the serial plate.

TMB2098N

70380601 9

Introduction

1

2

3

T001CE3A

1

2

3

How a Tumbler Works

A tumbler uses heated air to dry loads of laundry.

When the motor is started, the exhaust fan pulls room temperature air in through the air intake at the rear of the tumbler and over the heat source (burner flame for gas, heating element for electric, and coil for steam).

The heated air moves into the cylinder, where it is circulated through the wet load by the tumbling action of the cylinder.

The air then passes through the lint filter, exhaust fan, and is vented to the outdoors.

10 70380601

Section 3

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

Troubleshooting

IMPORTANT: Refer to wiring diagram for aid in testing tumbler components.

70380601 11

Troubleshooting

Tumbler Does

Not Start

Is motor

relay

inoperative?

Test relay and

replace if

necessary.

Yes

Is

loading door

open?

No

Close loading

door

completely.

Is drying timer in an off position

(Hybrid Timer

Models)?

Yes

Turn drying

timer on.

Check that

proper amount

of coins are

inserted.

Is the

START button

not properly

activated

(Hybrid Timer

Models)?

Press and

hold

START button

for three

seconds.

Is the

electrical power

off or circuit

breaker or fuse

blown?

Close and

lock lint

panel.

Check fuse

(in junction box)

and replace if

necessary.

Is there a

blown fuse

on tumbler?

Test coin drop

and replace if

inoperative.

Yes

Is coin drop

inoperative?

Is there an

incorrect

amount of coins

inserted into

coin drop?

No

Yes

No

Yes

Check power

supply, or

replace fuses.

No

Is the lint

panel

open?

No

Yes

No

Yes

TMB2036S

Yes

No

1. Tumbler Does Not Start

12 70380601

2. Motor Does Not Start

Motor Does

Not Start

Is the

electrical power

off or circuit

breaker fuse

blown?

No

Is the loading door switch or lint

panel switch not closed or switch

inoperative?

Is the

door switch

improperly

adjusted?

No

Check power

supply, or replace

fuses.

Yes

Close door, panel or test switch and

replace if

inoperative.

Yes

Refer to

Adjustments

Section for door

switch adjustment.

Yes

Is the start

circuit not

complete?

Yes

Press and hold

START button for

three seconds.

Is the motor

inoperative?

Yes

Have motor tested

and replace if

inoperative.

No

Is the

cylinder or

cylinder motor

binding?

No

Refer to wiring

diagram.

Yes

Replace fan or

motor assembly.

Yes

Replace cylinder,

bearing, rollers, or

motor assembly.

Yes

Is the

transformer

inoperative?

Yes

Test and replace

if necessary.

Is the

motor relay

inoperative?

Yes

Test relay and replace

if inoperative.

Is

the fan or fan

motor

binding?

Is there

broken, loose,

or incorrect

wiring?

No

Is the

airflow switch

inoperative

(Hyrid Timer

Models)?

Yes

Test switch,

replace or adjust

as required.

No

TMB2037S

No

Troubleshooting

70380601 13

Troubleshooting

3. Motor Overload Protector Cycles Repeatedly

Motor Overload

Protector

Cycles

Repeatedly

Is voltage

correct?

No

Yes

Installation

Manual for

electrical

requirements.

Refer to

Is clothes

load too

large?

No

Is clothes

cylinder

binding?

No

Is wiring

adequate?

No

Is make-up

air adequate?

Yes

Remove part of

load.

Check cylinder

for binding.

Check with

local power

company to

ensure that

wiring is

adequate.

Refer to

Installation

Manual for

make-up air

requirements.

Is there lint buildup around tumbler or poor

maintenance?

No

14 70380601

No

Yes

Is there

broken, loose

or incorrect

wiring?

Clean lint

accumulation

on and around

the motors.

Yes

Refer to wiring

diagram.

TMB1904S

4. Motor Runs But Cylinder Does Not Turn

Motor Runs But Cylinder

Does Not Turn

Troubleshooting

Is cylinder

belt

broken?

No

Is cylinder

binding?

Yes

Replace

cylinder belt.

Check cylinder

for binding.

TMB1905S

70380601 15

Troubleshooting

5. Motor Does Not Stop

Motor Does

Is the door switch or lint panel switch

not working

Not Stop

properly?

No

Yes

Test switches and replace if

inoperative.

Is coin drop not working

properly?

No

Is wiring

incorrect?

No

Is electronic

control

inoperative?

No

Yes

Test coin drop

and replace if

inoperative.

Refer to wiring

diagram.

Replace

electronic

control.

Is motor

inoperative?

16 70380601

relay

Yes

Test relay and

replace if

inoperative.

TMB2038S

6. Burner Does Not Ignite

Burner Does

Not Ignite

Is there

an improper or

inadequate exhaust

system?

No

Are there

blown fuses or

tripped circuit breakers

in external electric

supply line?

Yes

exhaust system

Yes

Refer to

Installation

Manual for

requirements.

Check fuses or

circuit breaker.

Is

stove limit thermostat 2 inoperative?

No

Is

there an

insufficient gas

supply?

No

Test thermostat 2

Yes

and replace if

inoperative.

Open partially closed gas shut-off valve, or

correct low gas

pressure. Check

manifold pressure

and adjust to

pressure specified on

serial plate. If

pressure cannot be

obtained, have your

local gas company

check main gas

pressure.

Troubleshooting

No

Is

drying

selector in the

“Cool Down”

portion of

cycle?

No

Is

the cabinet

thermostat

inoperative?

No

Is

stove limit

thermostat 1

inoperative?

Yes

Reset switch on

microprocessor.

Test thermostat

and replace if

inoperative.

Test thermostat 1

and replace if

inoperative.

Are the orifices

incorrect?

No

Is there

lint

buildup?

No

Is there

inadequate

ductwork and

make-up

air?

Tumbler is equipped

for type of gas

Yes

specified on serial

plate. If orifices are

different from that

specified on serial

plate, obtain and

install correct orifices.

compartment. Check

damper for lint

accumulation. Check

ductwork for lint

Refer to Installation

Manual to ensure that ductwork and

make-up air

openings are sized

accurately.

Clean lint

buildup.

No

70380601 17

No

Continued on

Troubleshooting

Continued from

there an

improper igniter

to burner

clearance?

Are valve coils

inoperative?

No

Clearance

should be

0.110 - 0.140

inch (2.79 - 3.55

mm).

Yes

Check valve

coils and

replace if

necessary.

Yes

Is

there a blown

fuse on

tumbler?

Yes

Check fuse

(located in

control box)

and replace if

necessary.

Is gas shut-off valve in the

closed

position?

Yes

Open shut-

off valve.

Is

motor switch inoperative?

No

Replace IEI

control.

Yes

Replace motor.

Yes

Is the

IEI control

inoperative?

TMB2187S-b

Yes

Connect

ground wire

to ground

terminal.

Is the

ground wire

from Instant

Electronic Ignition

(IEI) board not

connected to

ground

terminal?

No

Is

there broken,

loose or incorrect

wiring?

Yes

Refer

to wiring

diagram.

Is the lint

panel not

closed

properly?

Yes

Unlock and open

lint panel. Close

panel ensuring a

tight fit, then lock.

Is the

airflow switch

inoperative?

Test switch

and replace

if inoperative.

Yes

No

Continued on

6. Burner Does Not Ignite (continued)

18 70380601

6. Burner Does Not Ignite (continued)

c

Continued from

Is there

an inoperative

microprocessor or

hybrid timer?

No

Is

wrong

transformer

configuration

harness

installed?

No

Is Instant

Electronic

Ignition (IEI)

control in safety

lockout?

Yes

Test and replace

as needed.

Check incoming

voltage and install

correct

configuration

harness.

Reset IEI control by

opening and closing

loading door. (Non-

CE models only)

Reset IEI by

pressing reset

button on back of

unit. (CE models

only)

70380601 19

TMB2187S-

Troubleshooting

Burner Ignites and Goes Out

Repeatedly

Is there

insufficient

gas

pressure?

Check gas

supply and

pressure.

Yes

Is the

cabinet

thermostat

inoperative?

Yes

Test thermostat

and replace if

inoperative.

Is the

exhaust system

improper or

inadequate?

Yes

Refer to

Installation

Manual for

exhaust

system

requirements.

No

Does

tumbler have

improper

orifices?

Yes

Tumbler is equipped

for type of gas

specified on serial

plate. If orifices are

different from that

specified on serial

plate, obtain and

install correct

orifices.

No

Is there excessive igniter to burner

clearance?

Yes

Refer to

Paragraph 43.

Is

there inadequate

make-up air?

Yes

Refer to

Installation Manual for

make-up air

requirements.

No

Is the

thermistor

inoperative?

Yes

No

Replace

thermistor.

Is the control

heater relay

malfunctioning?

Yes

Replace control.

No

Is there

broken, loose

or incorrect

wiring?

Yes

Refer to wiring

diagram.

No

Yes

Repair damper to

working order.

Are the back

draft dampers

locked in close

position?

No

TMB1908S

No

7. Burner Ignites and Goes Out Repeatedly

20 70380601

8. Burner Does Not Shut Off

Burner Does

Not Shut Off

Are there

impurities on gas

valve seat,

preventing valve

from closing?

Yes

Troubleshooting

Replace gas

valve.

No

Is wiring correct?

No

Is control heater

relay

malfunctioning?

Yes

Refer to wiring

diagram.

Replace

control.

TMB1909S

70380601 21

Troubleshooting

9. Clothes Do Not Dry

Clothes Do Not

Dry

Is there

enough heating

time allocated for

the load?

Yes

Start cycle again

with enough time to

dry load.

Does

the burner ignite

and go out

repeatedly?

No

Yes

Refer to

Paragraph 7.

No

Is the burner not

igniting?

No

Is there

too much water in

articles being

dried?

No

Is

the clothes

load too

large?

No

Yes

Refer to

Paragraph 6.

Remove excess

water.

Remove part of load. Maximum

load is 25 pound

dry weight (cotton

load) for 25 pound

Tumbler, etc.

Is

the drying

selector

improperly

set?

No

Is

the voltage

incorrect?

No

Is there

inadequate

make-up

air?

No

Is the

exhaust duct to

the outside

blocked?

Yes

Set selector

for higher

setting.

Refer to Installation

Manual for electrical

requirements.

Refer to Installation

Manual for make-up

air requirements.

Yes

Clean duct to

remove blockage.

Is the

exhaust system

improper or

inadequate?

No

Yes

22 70380601

Refer to Installation

Manual for exhaust

system

requirements.

No

Continued on

9. Clothes Do Not Dry (continued)

Continued from

Is the lint screen

clogged?

No

Is the thermistor

inoperative?

No

Yes

Clean lint screen.

Replace thermistor.

Is the exhaust damper

binding?

No

Is the

cylinder speed

too fast?

No

Is airflow switch

bracket mounted

properly?

Yes

Adjust damper so it

turns freely.

Check belt is not

riding on outer

diameter of motor

pulley.

Check for proper

alignment: make

Yes

sure locator pins

are securely in

place and tighten

mounting screws.

70380601 23

TMB1910S-b

Troubleshooting

10.Tumbler Overheating

Tumbler

Overheating

Does

tumbler

have incorrect

main burner

orifices?

No

Is gas

pressure too high or

low?

No

Is the

make-up air

inadequate?

Ye s

Obtain and install

correct orifices.

Adjust gas pressure

as specified on

serial plate.

Refer to Installation

Manual for make-up

air requirements.

Is the

thermistor

sensor

inoperative?

No

Is the

exhaust

damper

binding?

No

Is the

control heater

relay

malfunctioning?

No

Ye s

Check wiring to

ensure thermistor

is connected.

Replace

thermistor if

necessary.

Remove lint build-

up on thermistor.

Adjust damper

so it turns

freely.

Replace control.

No

Is there

lint buildup?

No

Is the

exhaust system

restricted or

inadequate?

No

Ye s

Clean lint

compartment. Check

damper for lint

accumulation. Check

ductwork for lint

buildup.

Remove obstruction

or lint build up from

exhaust ductwork.

Refer to Installation

Manual for exhaust

system

requirements.

Are the safety covers missing, allowing

cool air to enter

tumbler?

No

Is the

lint screen

clogged with

fabric

softener?

No

Are there

holes in cabinets

due to foreign

objects?

Ye s

Replace covers.

Replace lint

screen.

Repair/replace

cabinet

components.

TMB1911S

24 70380601

11.Burner Not Burning Properly

Burner Not Burning

Properly

Is there lint/dirt in

burner tube?

Is the gas

pressure too high

or low?

No

Disassemble

burner and

blow out the dirt.

Yes

Check serial

plate on back of

tumbler for correct gas

pressure.

Yes

Is

the airflow

switch not

functioning

properly?

Yes

Replace airflow

switch.

Is there

inadequate

make-up

air?

Yes

Refer to Installation

Manual for make-up

air requirements.

TMB1912S

No

Yes

Clean off lint.

Is there lint buildup

around gas valve

spud?

No

Does

the tumbler have

incorrect orifices?

Yes

Tumbler is equipped

for the type of gas specified on serial

plate. If orifices are

different from that

specified on serial

plate, obtain and

install correct

orifices.

Is the

exhaust duct

restricted or

blocked?

Yes

Disassemble

and clean

exhaust system.

No

Troubleshooting

70380601 25

Troubleshooting

Loading Door

Opens During

Operation

Is tumbler

improperly

leveled?

Refer to Installation

Manual for leveling

leg adjustment.

Is clothes

load too

large?

Remove part of load

and restart tumbler.

Is loading

door strike

adjusted

incorrectly?

Refer to

Adjustments

Section for strike

adjustment.

Yes

No

Yes

No

Yes

TMB1913S

12.Loading Door Opens During Operation

26 70380601

13.Cylinder Continues to Spin with Door Open

NOTE: All tumbler panels must be in place and on the machine for proper operation.

Cylinder

Continues To

Spin With Door

Open

Troubleshooting

Is relay

inoperative?

Yes

Replace relay in control box.

TMB1914S

70380601 27

Troubleshooting

Coin Does Not Fall Into Coin Vault or Coin Drop Sensor Does Not

Register That Coin

Has Been Entered

Is proper electrical

power

supplied to

coin drop?

Incorrect electrical

connection may

prevent coins from

registering in coin drop.

Refer to wiring

diagram.

No

Is

machine

level?

Machines that are not

level may prevent coins

from following through required check stages

of drop. Refer to

Installation Manual

for instructions on

leveling machine.

Is coin

drop

clean?

Residue or lint build-up

may prevent coins from

following through

required check stages

of drop. Clean coin

drop.

Yes

No

Yes

No

TMB1915S

Is sensor

operative?

Yes

Replace coin drop

sensor.

No

14.Coin Does Not Fall into Coin Vault or Coin Drop Sensor Does Not Register that Coin Has Been Entered

IMPORTANT: Never use oil to correct coin drop problem. Oil residue will prevent coins from rolling properly.

IMPORTANT: Do not bend or damage mechanical parts within coin drop.

28 70380601

Section 4

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

Adjustments

15.Loading Door Switch

The door switch should be adjusted so the cylinder stops when door is opened 2 inches (51 mm), plus or minus 1/4 inch (6 mm). The switch is normally open and is closed when the door is closed. If adjustment is needed, proceed as follows: Refer to Figure 1.

a. Close door and start tumbler. Slowly open

loading door . Cylinder and heat system should shut off when door is open 2 inches (51 mm), plus or minus 1/4 inch (6 mm).

b. Slowly close loading door. When door is 2

inches or less from being fully closed, the switch actuator on the door should contact the switch plunger and depress it enough to close the switch with an audible “click”.

c. If switch actuator does not depress the switch

plunger enough to operate the switch, bend switch actuator OUTWARD and repeat steps “a” and “b.”.

16.Loading Door Strike

Refer to Figure 1. The door strike must be adjusted so that sufficient

tension holds loading door closed against the force of a load tumbling against it. The door is properly adjusted when 8-15 lbs. (3.60-6.75 kg) of pull is required to open door.

If adjustment is needed, follow these steps:

a. Open loading door. b. Loosen jamnut. c. Turn door strike screw in or out as required. d. Retighten jamnut.

Loading

Door

Switch

Actuator

Figure 1

Jamnut

Door Strike

Screw

70380601 29

T280SE3C

Section 5

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

Does the display on the

electronic control

increment properly?

Is connector H2 on the

control firmly seated in

its receptacle?

Are wires exiting coin

drop optical sensor cracked or broken?

Exit diagnostic

testing and reset

control. (Prompting

for vend price)

Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

Replace coin drop.

If problem still exists

then replace the

electronic control.

Start coin drop

diagnostic tests.

YES

NO

YES

NO

YES

NO

Gas and electric heat.

Single and three phase

power supply.

TMB1978S

Is the 3 pin connector

between coin drop and

control connected

correctly?

Micro Display Control (MDC)

Troubleshooting

Models with BC, BL, BX and BY Control Suffixes

17.Coins Ignored When Entered

30 70380601

18.Control Has No Display

Control has no display

Is there voltage across

H1-1 & H1-3 on

the control?

Replace electronic

control.

Is there power supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at

output side of the

primary fuses?

Is there voltage across

terminals 1 & 2 of

transformer primary?

Plug unit in and run

it.

Correct wiring

between primary

fuse and power

supply.

Replace primary

fuse(s).

Correct wiring

between primary

fuse and

transformer.

Is there voltage across

terminals 1 &

4 of transformer

secondary?

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring

between control and

secondary fuse.

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

TMB1979S

Gas, steam and electric heat.

Single and three phase power supply.

Micro Display Control (MDC) Troubleshooting

70380601 31

Micro Display Control (MDC) Troubleshooting

Control Has No Display

THERMISTOR

WHT

THERMISTOR

WHT

025 & 030 MODELS 035 & 055 MODELS

1

WHT/BLU

BLK

12345678910

N.C.

COM

ORG/BRN

FS-1

N.O.

SWITCH

AIR FLOW

H3-1 & H3-2

Iin= 3-30ma

TIME 20msec MIN.

START PULSE INPUT

H11L1

4N25

MACHINE RUNNING

Imax=5ma

H3-3 & H3-4

Vmax=28Vdc

OPTO OFF WHEN

AVAILABLE OUTPUT

24Vac

WHT/VLT

24Vac Ret

100 OHM

21

1/4 watt

3

4

5

H3

6

7

H6

123456

H1-4

H1-2

LIMIT

CABINET

THERMOSTAT

SEE VEND

APPLICATION DETAIL

H4

CHASSIS GROUND

GRN/YEL

BLK

1

897 45623

TEMP. REGULATING

10

H4

H1-3

H1-1

RED

H2-6

Door Sense Ret

HEAT RELAY

CIRCUIT CONTROLS

24Vac Ret

24VAC

CONTROL

POWER

SUPPLY

BRN/RED

WHT

H2-4

H2-3

TMB2213S

LINT

DOOR

FS-2

PANEL

SWITCH

RED/WHT

RED/BLK

N.O.

RED/WHT

COM COM

N.O.

HEAT RELAY

COIN DROPS

H5

512386411109712

DOOR SENSING CIRCUIT ALLOWS

RELAY ONLY WHEN DOOR IS

CLOSED & SWITCH IS PRESSED

CONTROL TO TURN ON MOTOR

MDC CONTROL

JUMPER H2-2 TO H2-5 AS FOLLOWS:

240Vac - 13.6K ohm 10 watt

VOLTAGE CONFIGURATION INPUT

24Vac - WIRE JUMPER

120Vac - 6.8K ohm 5 watt

H2-5

5

RED

H2-2

RED/BLK

MOTOR RELAY

H2-1

RED/BLK

RED

3

2

FUSE

PRIMARY

BLK

N

L1

TB1

SERVICE

32 70380601

L2

ONNECTION

LT. BLU

AGC-2A

250V

2

120V

1

BLK

4

1

1.5A

24V

3

24V

3.5A

2

4

FUSE

250V

1.25 T

SECONDARY

WHT

RED

6

FUSE

250V

MDL-3.5A

SECONDARY

RED/BLU

RED

7

19.Door Open Indicator

Is there voltage at

H2-1 on the Electronic

control?

Replace Control.

Is there power supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at output side of the

primary fuses?

Is there voltage across

terminals 1 & 2 of

transformer primary?

Plug unit in and run

it.

Correct wiring between primary fuses and power

suppl

y.

Replace primary

fuse(s).

Correct wiring between primary

fuses and

transformer.

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

NO

YES

Is there voltage at

N.O. of door

switch?

Is there voltage at

N.O. of lint panel

switch?

Check for proper

operation replace if

necessary

.

Correct wiring between N.O. on lint panel and COM on

door switch.

Correct wiring

between N.O. and

output of secondary

fuse.

Check for proper

function of door

switch replace if

necessary.

Correct wiring

between H2-1 of

electronic control

and COM of lint

panel switch.

YES

NO

Gas, steam and electric heat.

Single and three phase

Reference voltage

checks to transformer

neutral.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB2039S

Is there voltage across

terminals 2 & 3 of

transformer secondary?

Is there voltage at

COM of lint panel

switch with lint

panel closed?

With door closed is

there voltage to

COM of door

switch?

Micro Display Control (MDC) Troubleshooting

70380601 33

Micro Display Control (MDC) Troubleshooting

Door Open Indicator

BLK

THERMISTOR

WHT

BLK

THERMISTOR

WHT

025 & 030 MODELS 035 & 055 MODELS

1

RED

WHT/BLU

12345678910

N.C.

COM

ORG/BRN

FS-1

N.O.

SWITCH

AIR FLOW

H3-1 & H3-2

Iin= 3-30ma

TIME 20msec MIN.

START PULSE INPUT

H11L1

4N25

MACHINE RUNNING

H3-3 & H3-4

Vmax=28Vdc

OPTO OFF WHEN

AVAILABLE OUTPUT

24Vac

WHT/VLT

100 OHM

Imax=5ma

24Vac Ret

21

1/4 watt

3

4

5

H3

6

7

H6

123456

H1-4

H1-2

LIMIT

CABINET

THERMOSTAT

SEE VEND

APPLICATION DETAIL

BRN/RED

H4

H2-6

Door Sense Ret

24Vac Ret

24VAC

WHT

H2-4

H2-3

CHASSIS GROUND

GRN/YEL

1

HEAT RELAY

897 45623

TEMP. REGULATING

CIRCUIT CONTROLS

10

H4

H1-3

H1-1

CONTROL

POWER

SUPPLY

TMB2214S

LINT

DOOR

FS-2

PANEL

SWITCH

RED/WHT

RED/BLK

N.O.

RED/WHT

COM COM

N.O.

HEAT RELAY

COIN DROPS

H5

512386411109712

RED

10

9

MOTOR RELAY

H2-1

RED/BLK

11

RED/BLU

8

DOOR SENSING CIRCUIT ALLOWS

RELAY ONLY WHEN DOOR IS

CLOSED & SWITCH IS PRESSED

CONTROL TO TURN ON MOTOR

MDC CONTROL

VOLTAGE CONFIGURATION INPUT

24Vac - WIRE JUMPER

120Vac - 6.8K ohm 5 watt

JUMPER H2-2 TO H2-5 AS FOLLOWS:

240Vac - 13.6K ohm 10 watt

FUSE

1.25 T

250V

MDL-3.5A

H2-2

RED/BLK

250V

RED

7

H2-5

5

RED

4

2

LT. BLU

3

2

N

L1

TB1

SERVICE

L2

CONNECTION

34 70380601

FUSE

250V

AGC-2A

PRIMARY

BLK

120V

1

BLK

4

1

1.5A

24V

3

24V

3.5A

2

SECONDARY

WHT

RED

FUSE

6

SECONDARY

20.Motor Will Not Start/Run

Is there voltage across

H2-1 and H2-6 on

the electronic control ?

YES

Replace MDC

control.

Is there voltage

across H2-4 and H2-6

on the electronic control?

Is there voltage at

terminal 5 of the

motor control relay?

Is there voltage at

terminal 8 of motor

control relay?

Is there voltage across

terminals 1 & 4 of

the fan motor?

Does the fan motor

run?

Is there voltage at

terminal 6 of motor

control relay?

Is there voltage at

terminal 9 of motor

control relay?

Replace

control.

Correct wiring

between terminal 5

and power supply.

Replace motor

control relay.

Correct wiring

between fan motor

and motor control

relay.

Replace fan motor.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

YES

NO

YES

NO

Note: test conducted with vend

price satisfied and start button

pressed.

Correct wiring

between L1, L2 and

power supply.

Replace motor

control relay.

Is the unit equipped with single phase or three phase power?

Is there supply voltage

to L1 and L2 of the motor control relay?

Is there votlage across L1 & T1 and L2 & T2?

Single phase

NO

YES

NO

3 phase. Also

see Note on

Is there supply voltage

between L2 & L3 of

motor control relay?

Three phase. Also

see Note on next

page.

NO

YES

Is there voltage across

terminals L2 & T2 and

L3 & T3?

Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

YES

NO

Single phase

NO

Refer to Door

Open Indicator

flowchart.

(1)

Is there voltage across the coil of the motor control

relay?

Correct wiring to coil

of motor relay .

(2)

YES

NO

(3)

(4)

(5)

(6)

(7)

(8)

(10)

(11)

(12)

(13)

Gas, electric and steam heat.

Single and three phase power supply.

TMB1982S

Micro Display Control (MDC) Troubleshooting

70380601 35

Micro Display Control (MDC) Troubleshooting

Is there voltage across

terminals 1 & 4 of

cylinder motor?

Does the cylinder

motor run?

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder

motor.

NO

YES

Motors are

operational.

Note: For high voltage three phase supply (380 volts

or higher), the cylinder and fan motors are supplied by L1, L2, L3 through the motor relay te

rminals T1,

T2,

T3. Make the appropriate adjustments when

doing voltage checks.

(9)

TMB1982S

20.Motor Will Not Start/Run (continued)

Please see following 2 pages for wiring diagram information.

36 70380601

Micro Display Control (MDC) Troubleshooting

Motor Will Not Start/Run (Sheet 1 of 2)

TB1-N

4

BLK/RED

8

BLK/RED

6

LT. BLU

5

BLK

5

CYLINDER

M

MOTOR

9

FAN

M

8

THERMISTOR

025 & 030 MODELS 035 & 055 MODELS

1

MOTOR

5

WHT

WHT/BLU

AUX

MAIN 2

MAIN 1

THERM

PROT.

RUN

1

BLU/BLK

4

AUX

MAIN 2

THERM

PROT.

RUN

3

1

GRY/BLK

BLK

12345678910

H4

CHASSIS GROUND

GRN/YEL

BLK

1

HEAT RELAY

897 45623

TEMP. REGULATING

CIRCUIT CONTROLS

10

H4

H1-3

H1-1

CONTROL

POWER

SUPPLY

RED

MAIN 1

H2-6

24Vac Ret

24VAC

WHT

2

Door Sense Ret

3

H2-3

6 9

BA

WHT

H2-4

WHT

M

BRN/RED

M

N.C.

FS-1

WHT/

ORG/

ORG BRN

ORG/BRN

5

3

BRN

FAN MOTOR

WHT

4

7

N.O.

COM

START PULSE INPUT

SWITCH

CENTRIFUGAL

BRN/WHT

SWITCH

AIR FLOW

H11L1

H3-1 & H3-2

Iin= 3-30ma

TIME 20msec MIN.

IGN

4N25

MACHINE RUNNING

Imax=5ma

H3-3 & H3-4

Vmax=28Vdc

OPTO OFF WHEN

AVAILABLE OUTPUT

24Vac Ret

24Vac

WHT/VLT

WHT

100 OHM

1/4 watt

H3

H6

H1-4

H1-2

WHT

3

GND

TH

2

VLT/WHT

VLT

21

3

4

5

6

7

123456

GAS VALVE

ICM

LIMIT

STOVE

THERMOSTAT

LIMIT

CABINET

THERMOSTAT

SEE VEND

FIRST COIL

APPLICATION DETAIL

SECOND COIL

BLK

WHT/

1

VALV

4

GND

GRN/YEL

TB1-L1

7

SERVICE

208-240V

120V

SERVICE

TB1-L2

4

TMB2215S

70380601 37

MDC CONTROL

JUMPER H2-2 TO H2-5 AS FOLLOWS:

VOLTAGE CONFIGURATION INPUT

24Vac - WIRE JUMPER

H2-5

CONTROL TO TURN ON MOTOR

DOOR SENSING CIRCUIT ALLOWS

RELAY ONLY WHEN DOOR IS

240Vac - 13.6K ohm 10 watt

120Vac - 6.8K ohm 5 watt

RED/BLK

CLOSED & SWITCH IS PRESSED

MOTOR RELAY

H2-1

H2-2

RED/BLK

FS-2

RED/BLK

HEAT RELAY

COIN DROPS

H5

512386411109712

Micro Display Control (MDC) Troubleshooting

Motor Will Not Start (Sheet 2 of 2)

LT. BLU

4

AUX

MAIN 2

THERM

RUN

5

3

025 & 030 MODELS 035 & 055 MODELS

1

BLU/BLK

LT. BLU

4

AUX

MAIN 2

THERM

RUN

1

GRY/BLK

BLK

THERMISTOR

WHT

BLK

THERMISTOR

WHT

RED

WHT/BLU

12

13

TB1-L1

TB1-L2

TB1-L3

BLK/RED

L3

MM

BLK/WHT

L2

M

BLK

L1

T1 T2 T3

10

11

MAIN 1

PROT.

MAIN 1

PROT.

12345678910

H4

CHASSIS GROUND

GRN/YEL

3241

5

HEAT RELAY

TEMP. REGULATING

CIRCUIT CONTROLS

9

10 678

H4

H1-3

H1-1

SUPPLY

CONTROL

POWER

CYLINDER

MOTOR

FAN

WHT

2

WHT

H2-3

H2-6

Door Sense Ret

24Vac Ret

24VAC

69

WHT

5

3

BRN

SWITCH

WHT/

FAN MOTOR

CENTRIFUGAL

WHT

ORG/

WHT

13

3

M

14

M

ORG BRN

N.C.

N.O.

BRN/RED

COM

SWITCH

AIR FLOW

ORG/BRN

H2-4

FS-1

START PULSE INPUT

TIME 20msec MIN.

Iin= 3-30ma

H3-1 & H3-2

BRN/WHT

H11L1

AVAILABLE OUTPUT

OPTO OFF WHEN

H3-3 & H3-4

4N25

MACHINE RUNNING

Vmax=28Vdc

Imax=5ma

24Vac Ret

24Vac

HC1

HC2

VLT/WHT

LIMIT

STOVE

THERMOSTAT

VLT

LIMIT

100 OHM

1/4 watt

CABINET

THERMOSTAT

12

3

4

5

H3

6

7

3

H6

21654

H1-4

H1-2

SEE VEND

APPLICATION DETAIL

WHT/VLT

TMB2216S

WHT

BLK/

BLK

TB1-L2

TB1-L3

L3

L2

TB1-L1

38 70380601

WHT

2

BLK/

250V

FUSES

AGC-2A

PRIMARY

1

BLK

H3

T3

HC1

T2

HC2

SEE

JUMPER

12 3 4 5 6

TRANSFORMER

CONFIGURATION

HEAT RELAY

MOTOR RELAY

CLOSED & SWITCH IS PRESSED

RELAY ONLY WHEN DOOR IS

CONTROL TO TURN ON MOTOR

DOOR SENSING CIRCUIT ALLOWS

MDC CONTROL

120Vac - 6.8K ohm 5 watt

24Vac - WIRE JUMPER

240Vac - 13.6K ohm 10 watt

JUMPER H2-2 TO H2-5 AS FOLLOWS:

VOLTAGE CONFIGURATION INPUT

H2-1

H2-5

RED

4

1.5A

24V

1

3

4.0A

24V

2

H5

H2-2

RED/BLK

RED

250V

FUSE

1.25 T

SECONDARY

WHT

RED

FUSE

250V

MDL-3.5A

SECONDARY

FS-2

RED/BLK

LINT

PANEL

SWITCH

N.O.

RED/BLU

RED/WHT

COM COM

DOOR

SWITCH

RED/WHT

N.O.

RED

7468 1291011

H5

COIN DROPS

3215

21.Unit Will Not Heat – Gas

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring

between FS-2 and

COM of lint drawer.

Is there voltage at

FS-2 of MDC control?

Is there voltage

at FS-1 of MDC

control?

Correct wiring

between COM of

airflow sw

itch and

FS-1 of MDC

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow

switch and replace if

necessary.

Is there voltage across

COM & N.C. termin

al

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage at

terminal 7 of motor

control rel

ay?

Replace motor

control relay.

Is there voltage across

terminals 7 & 4 of

motor control relay?

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Is there voltage at

terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.

Is there voltage across

terminals 3 & 5 of fan motor

centrifugal switch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Is there voltage to the

input side of the

cabinet li

mit?

Replace cabinet

limit.

Is there voltage across

cabinet limit?

Correct wiring

between stove limit 1

and cabinet limit.

Is there voltage to the input side of the stove

limit?

NO

YES

Is the

thermistor

operational?

Replace MDC

control.

Replace

thermistor.

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB1985S

Micro Display Control (MDC) Troubleshooting

70380601 39

Micro Display Control (MDC) Troubleshooting

Replace the stove

limit.

Is there voltage across

the stove limit 1?

NO

YES

(12)

TMB1985S

(13)

Correct wiring

between stove limit 1

and stove limit 2.

Is there voltage to

input side of

stove limit 2?

Replace stove limit 2.

NO

YES

NO

YES

(14)

Is there voltage

across stove limit 2?

Correct wiring

between terminal 2

of ICM and stove

limit 2.

Is there voltage to

terminal 2 of

the Ignition Control

Module (ICM)?

Replace ICM board.

Is there voltage at

terminal 1 of ICM

board?

Correct wiring

between gas valve

and ICM board.

Is there voltage across

the coils of the gas

valve?

NO

YES

NO

YES

NO

YES

(16)

(15)

(17)

Note: Make sure unit is

not in a lock out

condition.

Replace gas valve

coils or complete

gas valve.

Is there gas flow

through the gas valve?

Replace high voltage ignition cable or igniter.

Does the igniter spark?

YES

NO

YES

NO

YES

Unit operational.

Is there a flame?

YES

NO

21.Unit Will Not Heat – Gas (continued)

Please see following page for wiring diagram information.

40 70380601

Micro Display Control (MDC) Troubleshooting

Unit Will Not Heat – Gas

TMB2217S

16

7

6

5

4

1

3

9

8

14

10

2

15

12

17

13

11

70380601 41

Micro Display Control (MDC) Troubleshooting

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring between FS-2 and COM of lint panel.

Is there voltage on

FS-2 of MDC control?

Is there voltage

on FS-1 of

MDC control?

Correct wiring

between COM of

airflow switch and

FS-1 of MDC

control.

Is there voltage on

COM of airflow

switch?

Check for proper

function of airflow

switch and replace if

necessary.

Is there voltage across

COM & N.C. terminal

of airflow switch?

Correct wiring between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage on

terminal 7 of motor

control relay?

Replace motor

control relay.

Is there voltage across

terminals 7 & 4 of

motor control relay?

Correct wiring

between terminal 3

of fan motor centrifugal switch and terminal 4 of

motor control relay.

Is there voltage on

terminal 3 of fan

motor centrifugal switch?

Replace fan motor.

Is there voltage across

terminals 3 & 5 of

fan motor centrifugal swi

tch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor centrifugal switch.

Is there voltage to the

input side of the

cabinet limit?

Replace cabinet

limit.

Is there voltage across

cabinet limit?

Correct wiring

between stove limit

and cabinet limit.

Is there voltage to the input side of the stove

limit?

NO

YES

Is the

thermistor

operational?

Replace MDC

control.

Replace

thermistor.

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB2040S

22.Unit Will Not Heat – Steam

42 70380601

22.Unit Will Not Heat – Steam (continued)

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Replace fan motor.

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Replace cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

Is there voltage across

the stove limit?

Correct wiring between steam valve and stove

limit.

Is there voltage across

the coil of the steam valve?

NO

YES

NO

YES

(12)

(13)

Does the steam valve

open allowing steam to flow?

Unit operational.

Replace or rebuild

steam valve.

No

TMB2040S

Micro Display Control (MDC) Troubleshooting

Please see following page for wiring diagram information.

70380601 43

Micro Display Control (MDC) Troubleshooting

Unit Will Not Heat – Steam

7

BLK

THERMISTOR

WHT

12345678910

H4

BLK

GRN/YEL

THERMISTOR

WHT

3241

5

WHT

025 & 030 MODELS 035 & 055 MODELS

TEMP. REGULATING

9

10 678

H4

H1-3

H1-1

HEAT RELAY

CIRCUIT CONTROLS

CHASSIS GROUND

WHT

H2-6

Door Sense Ret

24Vac Ret

24VAC

H2-3

WHT

5

846

3

BRN

SWITCH

WHT/

FAN MOTOR

CENTRIFUGAL

WHT

ORG/

WHT

5

M

BA

BRN/RED

3

WHT

H2-4

4

M

7

ORG BRN

N.C.

N.O.

COM

SWITCH

AIR FLOW

ORG/BRN

FS-1

2

TIME 20msec MIN.

Iin= 3-30ma

H3-1 & H3-2

START PULSE INPUT

BRN/WHT

H11L1

13

4N25

10 12

WHT/VLT

100 OHM

STEAM

VALV E

12

1/4 watt

3

4

5

H3

67

VLT/WHT WHT/BLK

VLT

LIMIT

STOVE

THERMOSTAT

LIMIT

CABINET

THERMOSTAT

TMB2218S

11

9

CONTROL

1

44 70380601

RED

WHT/BLU

MDC CONTROL

JUMPER H2-2 TO H2-5 AS FOLLOWS:

VOLTAGE CONFIGURATION INPUT

H2-5

SUPPLY

POWER

DOOR SENSING CIRCUIT ALLOWS

120Vac - 6.8K ohm 5 watt

24Vac - WIRE JUMPER

240Vac - 13.6K ohm 10 watt

CLOSED & SWITCH IS PRESSED

RELAY ONLY WHEN DOOR IS

CONTROL TO TURN ON MOTOR

H2-2

RED/BLK

MOTOR RELAY

H2-1

RED/BLK

FS-2

RED/BLK

H3-3 & H3-4

AVAILABLE OUTPUT

HEAT RELAY

OPTO OFF WHEN

MACHINE RUNNING

Vmax=28Vdc

24Vac

Imax=5ma

24Vac Ret

COIN DROPS

3

H6

21654

H1-4

H1-2

7468 1291011

H5

3215

SEE VEND

APPLICATION DETAIL

23.Unit Will Not Heat – Electric

Note: Tests are conducted with u

nit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring

between FS-2 and

COM of lint panel

switch.

Is there voltage at

FS-2 of MDC control?

Is there voltage

on FS-1 of

MDC control?

Correct wiring

between COM of

airflow switch and

FS-1 of MDC

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow

switch and replace if

necessary

.

Is there voltage across

COM & N.C. terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage at

terminal 14 of moto

r

control relay?

Replace motor

control relay.

Is there voltage across

terminals 13 & 14 of motor control rel

ay?

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 13 of

motor control relay

.

Is there voltage at terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.

Is there voltage across

terminals 3 & 5 of

fan motor centrifugal switch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Is there voltage to the

input side of the

cabinet limit?

Replace cabinet

limit.

Is there voltage across

cabinet limit?

Correct wiring

between stove limit

and cabinet limit.

Is there voltage to the input side of the stove

limit?

NO

YES

Is the

thermistor

operational?

Replace MDC

control.

Replace

thermistor.

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB2041S

Micro Display Control (MDC) Troubleshooting

70380601 45

Micro Display Control (MDC) Troubleshooting

Replace the stove

limit.

Is there voltage across

the stove limit?

Correct wiring

between heater

contactor and stove

limit.

Is there voltage across

the coil(s) of the heater

contactor(s)?

NO

YES

NO

YES

(12)

(13)

Is there voltage to the

L1, L2 and L3

terminals of HC1?

Correct wiring

between HC1 and

line voltage.

Do all elements

produce heat?

Check elements for

shorts or opens.

Check wires

between contactors

and elements.

Is there voltage across

T1 & T2, T2 & T3 and

T3 & T1?

Check for proper operation of contactors, replace

them if necessary.

Is there voltage to the

L1, L2 and L3

terminals of HC2?

YES

NO

Correct wiring

between HC2 and

line voltage.

(14)

(15)

YES

NO

(16)(17)(18)

NO

YES

NO

YES

Unit is operational

Note: Please make

the oppropriate

adjustments if your

unit is single phase.

TMB2041S

23.Unit Will Not Heat – Electric (continued)

Please see following page for wiring diagram information.

46 70380601

TMB2219S

L3

L2

L1

SERVICE

TB3

1

2

3

4

BLK/

WHT

BLK/

WHT

PRIMARY

FUSES

AGC-2A

250V

BLK

1

2

HEATING ELEMENTS

SECONDARY

FUSE

MDL-3.5A

250V

M

FAN MOTOR

CENTRIFUGAL

SWITCH

DOOR

SWITCH

WHT

CHASSIS GROUND

WHT

LINT

PANEL

SWITCH

AIR FLOW

SWITCH

RED

RED/WHT

N.O.

COM COM

N.O.

BRN/RED

WHT

ORG/BRN

COM

N.O.

ORG BRN

ORG/

WHT

WHT/

BRN

BRN/WHT

N.C.

BLK

THERMISTOR

M

14

13

RED/BLU

WHT

RED/WHT

RED/BLK

WHT/VLT

WHT

RED/BLK

RED

WHT/BLU

SECONDARY

FUSE

1.25 T

250V

RED

WHT

GRN/YEL

WHT

12345678910

WHT

THERMISTOR

BLK

WHT

H4

025 & 030 MODELS 035 & 055 MODELS

CABINET

LIMIT

THERMOSTAT

STOVE

LIMIT

THERMOSTAT

VLT

VLT/WHT

TB1-L3

TB1-L2

TB1-L1

SEE

TRANSFORMER

CONFIGURATION

JUMPER

HC2

L3

T3 T1

L1

HC2

HC1

HC2

HC1HC1

L3

T3

H3

H5

L2

T2

L2

T2

H2

H4

L1

T1

H1

H6

24V

4.0A

24V

1.5A

12 3 45 6

HC1

HC2

3

5

TEMP. REGULATING

HEAT RELAY

CIRCUIT CONTROLS

3215

FS-2

H2-1

4N25

24Vac Ret

24Vac

MACHINE RUNNING

H6

3

APPLICATION DETAIL

SEE VEND

H5

7468 1291011

COIN DROPS

H1-4

H1-2

21654

6

7

Vmax=28Vdc

Imax=5ma

H3

5

4

3

HEAT RELAY

MOTOR RELAY

START PULSE INPUT

AVAILABLE OUTPUT

TIME 20msec MIN.

Iin= 3-30ma

H3-1 & H3-2

OPTO OFF WHEN

H3-3 & H3-4

MDC CONTROL

120Vac - 6.8K ohm 5 watt

24Vac - WIRE JUMPER

240Vac - 13.6K ohm 10 watt

JUMPER H2-2 TO H2-5 AS FOLLOWS:

VOLTAGE CONFIGURATION INPUT

H2-2

H2-5

SUPPLY

POWER

CONTROL

CLOSED & SWITCH IS PRESSED

RELAY ONLY WHEN DOOR IS

CONTROL TO TURN ON MOTOR

DOOR SENSING CIRCUIT ALLOWS

24Vac Ret

24VAC

H1-1

H1-3

9

H4

10 678

1/4 watt

12

100 OHM

H11L1

FS-1

H2-4

H2-3

Door Sense Ret

H2-6

3241

1

14

7

846

10 12

13

5

2

3

11

17

16

18

15

9

Micro Display Control (MDC) Troubleshooting

Unit Will Not Heat – Electric

70380601 47

Micro Display Control (MDC) Troubleshooting

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the dryer(s) before servicing.

• Close gas shut-off valve to gas dryer(s) before servicing.

• Never start the dryer(s) with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the dryer is properly grounded.

W001R1

WARNING

24.Error Codes

OP - Indicates physical “open” in the thermistor circuit. Possible causes are: 1) thermistor, 2) wiring between control and thermistor, 3) control.

SH - Indicates a “short” in the thermistor circuit. Possible causes are: 1) shorted thermistor, 2) a short in the wiring between control and thermistor, 3) control.

Card Reader Machines: (In addition to the above errors)

EC:19 - Indicates no card reader communication. The control and the reader cannot communicate. Check reader, control and harness.

NOTE: For all other card reader errors, consult the card reader manual provided by the manufacturer.

Display Definition Corrective Action

OP

Indicates an open circuit in the thermistor.

• Check thermistor. Replace if inoperative.

• Check wiring between control and

thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

SH

Indicates a short circuit in the thermistor.

• Check thermistor. Replace if inoperative.

• Check wiring between control and

thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

EC:19

*Card Reader

models only

Indicates no communication between control and card reader.

• Check card reader. Replace if inoperative.

• Check wire harness connecting card reader

and control. Replace if inoperative.

• Check control. Replace if inoperative.

48 70380601

Micro Display Control (MDC) Troubleshooting

TMB2241S

70380601 49

Gas and Steam Models

Control Circuit Schematic

Micro Display Control (MDC) Troubleshooting

TMB2221S

50 70380601

Gas and Steam Models

Control Circuit Connection

Micro Display Control (MDC) Troubleshooting

TMB2027S

70380601 51

Gas and Steam Models

Control Box Schematic

Micro Display Control (MDC) Troubleshooting

TMB2026S

52 70380601

Gas and Steam Models

Control Box Connection

Micro Display Control (MDC) Troubleshooting

TMB2222S

70380601 53

Gas and Steam Models

Control Circuit Schematic

Micro Display Control (MDC) Troubleshooting

TMB2223S

54 70380601

Gas and Steam Models

Control Circuit Schematic

Micro Display Control (MDC) Troubleshooting

TMB2027S

70380601 55

Gas and Steam Models

Control Box Schematic

Micro Display Control (MDC) Troubleshooting

TMB2026S

56 70380601

Gas and Steam Models

Control Box Connection

TMB2220S

Micro Display Control (MDC) Troubleshooting

70380601 57

Electric Models

Control Circuit Schematic

Micro Display Control (MDC) Troubleshooting

TMB2224S

58 70380601

Electric Models

Control Circuit Connection

Micro Display Control (MDC) Troubleshooting

TMB2030S

70380601 59

Electric Models

Control Box Connection

Micro Display Control (MDC) Troubleshooting

TMB2031S

60 70380601

Electric Models

Control Box Schematic

Section 6

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

Check the following:

- IR communication disabled by manual programming.

- Is the IR window on the control covered or blocked.

- if needed, change control board.

Check the following:

- low battery in handheld communication device.

- low battery in the Symbol SP

T 1800

infra-red box.

- poor connection between IR cup and Micro-Wand.

- poor connection between IR box and

Symbol SPT 1800.

- is the IR window covered or blurred

on the control.

Communication

sequence checks

out.

Aim handheld

communication

device closer and

try again.

Is there a response of

any kind from the

electronic control?

Does the control

respond?

Does the electronic

control display E:OF

or -C-?

NO

YES

-C-

"E:OF"

NO

YES

Gas and electric heat. Single and three phase

power supply.

TMB1991S

Attempt to

communicate with

the electronic

control from

the handheld

communication

device

Replace the

electronic control.

NetMaster Troubleshooting

Models with NC, NR, NX, NY, ZC, ZR, ZX and ZY

Control Suffixes

25.No Infra-red (IR) Communication

70380601 61

NetMaster Troubleshooting

Does the display on the

electronic control

increment properly?

Is connector H5 on the control firmly seated in

its receptacle?

Is the 3 pin connector

between coin drop and

control connected

correctly?

Are wires exiting coin

drop optical sensor cracked or broken?

Exit diagnostic

testing and reset

control. (Prompting

for vend price)

Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

Replace coin drop.

If problem still exists

then replace the

electronic control.

Start coin drop

diagnostic tests.

YES

NO

YES

NO

YES

NO

Gas and electric heat.

Single and three phase

power supply.

TMB1992S

26.Coins Ignored When Entered

62 70380601

27.Control Has No Display

Is there voltage across

H1-1 & H1-3 on

the control?

Replace electronic

control.

Is there powe

r supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at output side of the

primary fuses?

Is there voltage across

terminals 1 & 2 of

transformer primary?

Plug unit in and run

it.

Correct wiring

between primary

fuse and power

supply.

Replace primary

fuse(s).

Correct wiring

between primary

fuse and

transformer.

Is there voltage across

terminals 1 &

4 of transformer

secondary?

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring

between control and

secondary fuse.

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

TMB1993S

Gas,

steam

and electric heat.

Single and three phase

power supply.

NetMaster Troubleshooting

70380601 63

NetMaster Troubleshooting

TMB2225S

1

2

3

4

5

6

7

Control Has No Display

64 70380601

28.Door Open Indicator

Is there voltage at

H2-1 on the electronic

control?

Replace control.

Is there power supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at output side of the

primary fuses?

Is there voltage across

terminals 1 & 2 of

transformer primary?

Plug unit in and run

it.

Correct wiring between primary fuses and power

supply.

Replace primary

fuse(s).

Correct wiring between primary

fuses and

transformer.

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

NO

YES

Is there voltage at

N.O. of door

switch?

Is there voltage at

N.O. of lint panel

switch?

Check for proper

operation replace if

necessary

.

Correct wiring

between N.O. on lint

panel and COM on

door switch.

Correct wiring

between N.O. and

output of secondary

fuse.

Check for proper

function of door

switch replace if

necessary.

Correct wiring

between H2-1 of

electronic control

and COM of lint

panel switch.

YES

NO

Gas, steam and electric heat. Single and three phase supply.

Reference voltage

checks to transformer

neutral.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB2042S

Is there voltage across

terminals 2 & 3 of

transformer secondary?

Is there voltage at COM of lint panel

switch with lint

panel closed?

With door closed is

there voltage to

COM of door

switch?

NetMaster Troubleshooting

70380601 65

NetMaster Troubleshooting

TMB2226S

1

4

6

8910 11

5

3

2

7

Door Open Indicator

66 70380601

29.Motor Will Not Start/Run

Is there voltage across

H2-1 and H2-6 on

the electronic control ?

YES

Replace electronic

control.

Is there voltage

across H2-4 and H2-6

on the electronic control?

Is there voltage at

terminal 5 of the

motor control relay?

Is there voltage at

terminal 8 of motor

control relay?

Is there voltage across

terminals 1 & 4 of

the fan motor?

Does the fan motor

run?

Is there voltage at

terminal 6 of motor

control relay?

Is there voltage at

terminal 9 of motor

control relay?

Replace

control.

Correct wiring

between terminal 5

and power supply.

Replace motor

control relay.

Correct wiring

between fan motor

and motor control

relay.

Replace fan motor.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

YES

NO

YES

NO

Note: test conducted with vend

price satisfied and start button

pressed.

Note: tests conducted with vend

price satisfied and start button

pressed.

Correct wiring

between L1, L2 and

power supply.

Replace motor

control rela

y.

Is the unit equipped

with single phase or

three phase power?

Is there supply voltage

to L1 and L2 of the

motor control relay?

Is there votlage across L1 & T1 and L2 & T2?

Single phase

NO

YES

NO

3 phase.

Also

see note on

Is there supply voltage

between L2 & L3 of

motor control relay?

Three phase. Also

see Note on next

page.

NO

YES

Is there voltage across terminals L2 & T2 and

L3 & T3?

Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

YES

NO

Single phase

Gas, electric and steam heat.

Single and three phase supply.

NO

Refer to Door

Open Indicator

flowchart.

(1)

Is there voltage

across the coil of

the motor control

relay?

Correct wiring to coil

of motor relay .

(2)

YES

NO

(3)

(4)

(5)

(6)

(7)

(8)

(10)

(11)

(12)

(13)

TMB2043S

NetMaster Troubleshooting

70380601 67

NetMaster Troubleshooting

Is there voltage across

terminals 1 & 4 of

cylinder motor?

Does the cylinder

motor run?

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder

motor.

NO

YES

Motors are

operational.

Note: For high voltage three phase supply (380 volts

or higher), the cylinder and fan motors are supplied

by L1, L2, L3 through the motor relay te

rminals T1,

T2,

T3. Make the appropriate adjustments when

doing voltage checks.

(9)

TMB2043S

29.Motor Will Not Start/Run (continued)

Please see following 2 pages for wiring diagram information.

68 70380601

Motor Will Not Start/Run

1 Phase Models

TMB2227S

7

8

69

5

4

3

2

1

70380601 69

NetMaster Troubleshooting

Motor Will Not Start

3 Phase Models

TMB2228S

12

13

6 9

10

11

3

2

1

70 70380601

30.Unit Will Not Heat – Gas

Note: Tests are conducted with u

nit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring

between FS-2 and

COM of lint panel.

Is there voltage at

FS-2 of the control?

Is there voltage

at FS-1 of the

control?

Correct wiring between COM of airflow switch and

FS-1 of the

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow

switch and replace if

necessary.

Is there voltage across COM & N.O. terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

rel

ay and N.O.

terminal on airflo

w

switch.

Is there voltage at

te

r

minal 7 of motor

control relay?

Replace motor

control relay.

Is there voltage across

terminals 7 & 4 of

motor control relay?

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Is there voltage at terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.

Is there voltage across

te

rminals 3 & 5 of fan motor

centrifugal switch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor

cent

rifugal switch.

Is there voltage to the

input side of the

cabinet limit?

Replace cabinet

limit.

Is there voltage across

cabinet limit?

Correct wiring

bet

ween stove limit 1

and cabinet limit.

Is there voltage to

the input side of

stove limit 1?

NO

YES

Is the

thermistor

operational?

Replace the

control.

Replace

thermistor.

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB2231S

NetMaster Troubleshooting

70380601 71

NetMaster Troubleshooting

YES

NO

Replace

stove limit 1.

Is there voltage across

stove limit 1?

Correct wi

ring

between terminal 2

of ICM and stov

e

limit.

Is there

v

oltage to

te

r

minal 2 of

the Ignition Control

Module (ICM)?

Replace ICM board

.

Is there voltage at

terminal 1 of ICM

board?

Correct wiring

between gas

valve

and ICM board.

Is there voltage across

the coils of the gas

valve?

Replace gas valve

coils or complete

gas valve.

Is there gas flow

through the gas valve?

Replace high voltage ignition cable or igniter.

Does the igniter spark?

Unit operational.

Is there a flame?

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(12)

(15)

Correct wiring to

input side of

stove limit 2 and

stove limit 1.

Is there voltage to the

input side of the

stove limit 2?

NO

YES

(13)

Replace

stove limit 2.

Is there

voltage across

stove limit 2?

NO

YES

(14)

(16)

(17)

Note

: Make sure unit is

not in a loc

k out

condition.

TMB2231S

30.Unit Will Not Heat – Gas (continued)

Please see following page for wiring diagram information.

72 70380601

Unit Will Not Heat – Gas

NetMaster Troubleshooting

TMB2229S

17

16

8

7

6

5

4

3

2

1

9

15

14

10

13

12

or

11

70380601 73

NetMaster Troubleshooting

31.Unit Will Not Heat – Steam

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

(1)

Is there voltage on

FS-2 of electronic control?

YES

Replace

(2)

Is there voltage

on FS-1 of

electronic

control?

YES

Is there voltage on

COM of airflow

switch?

YES

thermistor.

NO

(3)

NO

Is the

thermistor

operational?

NO

Correct wiring

between FS-2 and

COM of lint panel.

Replace electronic

NO

YES

Correct wiring

between COM of airflow switch and FS-1 of electronic

control.

(7)

Is there voltage on

terminal 3 of fan

motor centrifugal switch?

YES

(8)

Is there voltage across

terminals 3 & 5 of

fan motor centrifugal switch?

NO

(9)

Is there voltage to the

input side of the

cabinet limit?

YES

(10)

NO

YES

NO

Correct wiring

between terminal 3

of fan motor centrifugal switch and terminal 4 of

motor control relay.

Replace fan motor.

Correct wiring

between cabinet

limit and terminal "5"

of fan motor

centrifugal switch.

(4)

Is there voltage across COM & N.C. terminal

of airflow switch?

NO

(5)

Is there voltage on

terminal 7 of motor

control relay?

YES

(6)

Is there voltage across

terminals 7 & 4 of

motor control relay?

NO

YES

NO

YES

Check for proper

function of airflow

switch and replace if

necessary.

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Replace motor

control rela

y.

Is there voltage across

cabinet limit?

NO

(11)

Is there voltage across

the coil of the steam valve?

YES

Does the steam valve

open allowing steam to flow?

Unit operational.

YES

NO

No

Replace cabinet

limit.

Correct wiring between steam valve and stove

limit.

Replace steam

valve.

TMB2044S

74 70380601

NetMaster Troubleshooting

TMB2230S

1

7

8

10

4

6

5

2

3

9

11

Unit Will Not Heat – Steam

70380601 75

Section 7

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W002

WARNING

TMB2051S

Hybrid Timer Control Troubleshooting

Models with QT, SD and SX Control Suffixes

32.Coins Ignored When Entered

Start coin drop

diagnostic tests.

Gas and electric heat.

Single and three phase

power supply.

Does the light

on the control

increment properly?

NO

Is connector H2 on the control firmly seated in

its receptacle?

YES

Is the 3 pin connector

between coin drop and

control connected

correctly?

YES

Are wires exiting coin

drop optical sensor cracked or broken?

NO

YES

NO

YES

Exit diagnostic

testing and reset

control. (Prompting

for vend price)

Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

Replace coin drop.

If problem still exi

then replace the

electronic control.

76 70380601

sts

TMB2051S

33.Control Has No Display – OPL Models

Gas, steam and electric heat.

Single and three phase supply.

Hybrid Timer Control Troubleshooting

(6)

Is there voltage

supplied to the unit?

YES

Note: Reference volt

(1)

Is there voltage to the

input side of the primary fuse(s)?

YES

(2)

Is there voltage to the

output side of the

primary fuse(s)?

YES

(3)

Is there voltage

across the primary side

of the transformer?

NO

supply neutral.

NO

Connect supply

voltage and run unit.

age to

Correct wiring

between primary

fuse and supply.

Replace primar y

Correct wiring

between transformer

and primary fus e.

fuse.

Check H6-1 (+) and H6-2 (-) for +5 VDC.

YES

Replace display

assembly.

NO

Replace hybrid

control assemb ly.

YES

(4)

Is there voltage acr oss

2 & 3 of transformer

secondary?

YES

(5)

Is there volt age acr oss

terminals H1-3 &

H1-1 on hybrid timer?

YES

70380601 77

NO

Replace transformer

Correct wiring

between hybrid timer

and transformer

secondary.

TMB2000S

Hybrid Timer Control Troubleshooting

TMB2106S

1

2

3

4

1

2

3

1

2

3

4

1

2

3

4

Control Has No Display – OPL Models (Sheet 1 of 2)

78 70380601

Hybrid Timer Control Troubleshooting

5

6

Control Has No Display – OPL Models (Sheet 2 of 2)

TMB2222S

70380601 79

Hybrid Timer Control Troubleshooting

Is there voltage between

H1-1 & H1-3 on

the control?

Replace hybrid

control.

Is there powe

r supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at

output side of the

primary fuses?

Is there voltage

across the

transformer primary?

Plug unit in and run

it.

Correct wiring

between primary

fuse and power

supply.

Replace primary

fuse(s).

Correct wiring

between primary

fuse and

transformer.

Is there voltage across

terminals 2 &

3 of transformer

secondary?

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace se

condary

fuse.

Correct wiring between

lint panel switch

and hybrid control.

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Is there voltage

at COM of

door switch?

Connect wiring

between COM and

output of secondary

fuse.

YES

NO

(8)

With door closed,

is there voltage

to NO of door

switch?

Replace

door switch.

YES

NO

(9)

(10)

(11)

With lint panel closed, is there

power at NO

connection?

Replace

lint panel switch.

YES

NO

Is there voltage

at COM of the

lint panel

switch?

Connect wiring

between door switch

and COM of lint

panel switch.

YES

NO

TMB2052S

Gas, steam and electric heat.

Single and three phase power supply.

34.Display Flashes “dr” With Door Closed – OPL Models

80 70380601

Hybrid Timer Control Troubleshooting

10

11

6

7

8

9

1

Display Flashes “dr” With Door Closed – OPL Models (Sheet 1 of 2)

TMB2222S

70380601 81

Hybrid Timer Control Troubleshooting

2

3

4

5

2

3

4

2

3

4

2

3

4

5

Display Flashes “dr” With Door Closed – OPL Models (Sheet 2 of 2)

TMB2108S

82 70380601

35.Vend Satisfied, No In Use LED – Coin Models

Vend Satisfied,

No In Use LED –

Coin Models

Is

there voltage

at the input

side of the

primary fuse?

Is

there voltage

at the input

side of the

transformer?

Is

there voltage

at the output

side of the

transformer?

Is

there voltage

at the input

side of the secondary

fuse?

Is there voltage at the output

side of the secondary

fuse?

Correct wiring

between the primary fuse

and the

terminal block.

No

Yes

Correct wiring

between the

transformer

and the

secondary

fuse.

Yes

Replace

secondary

fuse.

Is

there voltage

at the output

side of the

primary fuse?

Replace the primary fuse.

Correct wiring

between the

primary fuse

and the

transformer.

Replace

transformer.

Yes

No

Yes

No

Yes

No

Is there voltage

at COM of the

door switch?

Correct wiring

between the

secondary

fuse and COM

of the door

switch.

No

continued on

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Is there

power to the

conrol of H1-1

and H1-3?

Yes

Correct wiring

between

fuse and

control.

No

(8)

Yes

Hybrid Timer Control Troubleshooting

70380601 83

Hybrid Timer Control Troubleshooting

continued from previous page

Is

there voltage

at COM of the

lint drawer

switch?

Correct wiring

between the

door switch

and lint drawer

switch.

Is

there voltage

at NO of the

lint drawer

switch?

Replace the

lint drawer

switch.

Is there power at H3-1 and H3-3

on the control?

Correct wiring

between the

lint drawer switch and H3 on the control.

Is

the H6

connection

plugged in

securely on the

control?

Re-seat the

H6 connection

to the control.

No

Yes

No

Yes

No

Yes

No

Is the

optic-coupler

harness

connected

securely into the

control

harness?

Re-seat the

optic-coupler

harness to the

control.

Replace the

opto-coupler on

the coin drop.

Replace the

control.

Unit is

operational.

No

Yes

No

Yes

TMB2022S-b

(10)

(11)

(12)

(13)

(9)

Is

there voltage

at NO of the

door switch?

Replace the door switch.

No

Yes

35.Vend Satisfied, No In Use LED – Coin Models (continued)

84 70380601

Hybrid Timer Control Troubleshooting

1

2

3

4

1

2

3

1

2

3

1

2

3

4

Vend Satisfied, No In Use LED – Coin Models (Sheet 1 of 2)

TMB2106S

70380601 85

Hybrid Timer Control Troubleshooting

TMB2232S

11

6

12

5

10

8

7

9

Vend Satisfied, No In Use LED – Coin Models (Sheet 2 of 2)

86 70380601

36.In Use LED Lit, No Motor Run – Coin Models

In Use LED Lit,

No Motor Run –

Coin Models

Is

there continuity

through the start switch

circuit?

Is

there voltage

at A1 on the

motor relay?

Is

there voltage

across A1 and

A2 on the

motor relay?

Is

there voltage

at the input

side of the

motor relay?

Is there voltage at the output

side of the

motor relay?

Correct or

replace the

start switch or

start switch

wiring.

No

Yes

Replace the

motor relay.

Is

there voltage

at H3-6 on the

control?

Replace the

control.

Correct wiring

between the

control and

the motor

relay A1.

Yes

No

Yes

No

Yes

No

Is there voltage

across the

lines of the

motor?

Correct wiring

between the

motor and

motor relay.

Yes

No

Replace the

motor.

TMB2023S

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Correct wiring

between the

control and

the motor

relay A2.

Correct wiring

between the

motor relay

and terminal

block.

No

Yes

Hybrid Timer Control Troubleshooting

70380601 87

Hybrid Timer Control Troubleshooting

TMB2232S

2

4

3

1

In Use LED Lit, No Motor Run – Coin Models (Sheet 1 of 2)

88 70380601

Hybrid Timer Control Troubleshooting

6

5

7

6

5

7

6

5

6

5

7 7

7

7 7

7

6

5

6

5

7 7

7

7 7

7

In Use LED Lit, No Motor Run – Coin Models (Sheet 2 of 2)

TMB2106S

70380601 89

Hybrid Timer Control Troubleshooting

Is there voltage

across the lines of

cylinder motor?

Does the cylinder

motor run?

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder

motor

.

NO

YES

Motors are

operational.

(9)

Is there voltage across

H3-1 and H3-6 on

the electronic control ?

YES

Is there voltage

across H3-4 and H3-6

on the electronic control?

Is there voltage at

the input side of the

motor control relay?

Is there voltage at

the output side of motor

control relay?

Is there voltage

across the lines of

the fan motor?

Is there voltage at

the input side of motor

control relay?

Is there voltage at

the output side of motor

control relay?

Replace

control.

Correct wiring

between control relay

and power supply.

Replace motor

control rela

y.

Correct wiring

between fan motor

and motor control

relay.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

YES

NO

YES

NO

Note: test conducted with vend

price satisfied and start button

pressed.

YES

NO

Refer to Vend Satisfied,

No In Use LED - Coin Models

flowchart.

(1)

Is there voltage across the coil of the motor control

relay?

Correct wiring to coil

of motor relay .

(2)

YES

NO

(3)

(4)

(5)

(6)

(7)

(8)

TMB2047S

Gas, electric and steam heat.

Single and three phase power supply.

NOTE: Please use the

appropriate wiring diagram

from the following pages.

37.Motor Will Not Start/Run – Coin Models

90 70380601

Please see following 2 pages for wiring diagram information.

Hybrid Timer Control Troubleshooting

TMB2232S

2

1

3

Motor Will Not Start/Run – Coin Models (Sheet 1 of 2)

70380601 91

Hybrid Timer Control Troubleshooting

5

4

6

7

8

9

6

7

9

5

4

8

6

5

6

5

7 7

7

7 7

7

6

5

6

5

7 7

7

7 7

7

Motor Will Not Start/Run – Coin Models (Sheet 2 of 2)

TMB2106S

92 70380601

38.Motor Will Not Start/Run – OPL Models

Hybrid Timer Control Troubleshooting

Note: test conducted with vend

(1)

price satisfied and start button

Is there voltage across

H4-7 and H4-4 on

the electronic control ?

YES

(2)

Is there voltage

across H4-3 and H4-4

on the electronic control?

YES

(3)

Is there voltage across the coil of the motor control

relay?

YES

NOTE: Please use the

appropriate wiring diagram

from the following pages.

pressed.

NO

Refer to Control Has No

Display - OPL Models

Replace

control.

Correct wiring to coil

of motor relay .

Gas, electric and steam heat.

Single and three phase power supply.

flowchart.

across the lines of

Is there voltage at

the input side of motor

Is there voltage at

the output side of motor

(6)

Is there voltage

the fan motor?

YES

(7)

control relay?

YES

(8)

control relay?

YES

(9)

NO

Correct wiring

between fan motor

and motor control

relay.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

(4)

Is there voltage at

the input side of the

motor control relay?

YES

(5)

Is there voltage at

the output side of motor

control relay?

YES

NO

Correct wiring

between control relay

and power supply.

Replace motor

control relay.

Is there voltage

across the lines of

cylinder motor?

YES

Does the cylinder

motor run?

YES

Motors are

operational.

NO

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder

r.

moto

TMB2046S

Please see following 2 pages for wiring diagram information.

70380601 93

Hybrid Timer Control Troubleshooting

2

1

3

Motor Will Not Start/Run – OPL Models (Sheet 1 of 2)

TMB2233S

94 70380601

Hybrid Timer Control Troubleshooting

5

4

6

7

9

8

5

4

6

7

9

8

6

5

6

5

7 7

7

7 7

7

6

5

6

5

7 7

7

7 7

7

Motor Will Not Start/Run – OPL Models (Sheet 2 of 2)

TMB2106S

70380601 95

Hybrid Timer Control Troubleshooting

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring

between FS-2 and

NO of lint panel.

Is there voltage at

FS-2 of hybrid control?

Is there voltage at FS-1 of hybrid

control?

Correct wiring

between COM of

airflow switch and

FS-1 of hybrid

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow

switch and replace if

necessary.

Is there voltage across

COM & NO terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and NO

terminal on airflow

switch.

Is there voltage at

terminal 13 of motor

control relay?

Replace motor

control relay.

Is there voltage across

terminals 13 & 14 of

motor control relay?

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Is there voltage at

terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.

Is there voltage across

terminals 3 & 5 of fan motor

centrifugal switch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Is there voltage to the

input side of the

cabinet limit?

Replace cabinet

limit.

Is there voltage across

cabinet limit?

Correct wiring

between stove limit 1

and cabinet limit.

Is there voltage to the input side of the stove

limit 1?

NO

YES

Is the

thermistor

operational?

Replace hybrid

control.

Replace

thermistor.

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

39.Unit Will Not Heat – Gas – Coin Models

96 70380601

Hybrid Timer Control Troubleshooting

Replace the stove

limit.

Is there voltage across

the stove limit 1?

NO

YES

(12)

TMB2048S

(13)

Correct wiring

between stove limit 1

and stove limit 2.

Is there voltage to

input side of

stove limit 2?

Replace stove limit 2.

NO

YES

NO

YES

(14)

Is there voltage

across stove limit 2?

Correct wiring

between terminal 2

of ICM and stove

limit 2.

Is there voltage to

terminal 2 of

the Ignition Control

Module (ICM)?

Replace ICM board.

Is there voltage at terminal 1 of ICM

board?

Correct wiring

between gas valve

and ICM board.

Is there voltage across

the coils of the gas

valve?

NO

YES

NO

YES

NO

YES

(16)

(15)

(17)

Note: Make sure unit is

not in a lock out

condition.

Replace gas valve

coils or complete

gas valve.

Is there gas flow

through the gas valve?

Replace high voltage ignition cable or igniter.

Does the igniter spark?

YES

NO

YES

NO

YES

Unit operational.

Is there a flame?

YES

NO

39.Unit Will Not Heat – Gas – Coin Models (continued)

Please see following page for wiring diagram information.

70380601 97

Hybrid Timer Control Troubleshooting

2

1

3

5

4

6

7

8

12

14

10

9

11

13

15

16

17

Unit Will Not Heat – Gas – Coin Models

TMB2232S

98 70380601