Traulsen INTELA-TRAUL Service Manual

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INTELA-TRAUL

Quality Refrigeration

MASTER SERVICE MANUAL

Form Number TR35705, revised 10/04

Traulsen

4401 Blue Mound Road - Fort Worth, Texas 76106

Phone: (800) 825-8220 or (817) 625-9671

Fax-Service (817) 740-6757

For All Full Size Undercounter, G-Series and

R&A Series Refrigerator, Freezer, Dual-Temp

and Hot Food Unit Controllers

TABLE OF CONTENTS

-1-

I. General Information

a) How To Use This Manual Page 2 b) About INTELA-TRAUL Page 2 c) Operating The Controller Page 2

II. Basic Service Procedures

a) Adjusting The Temperature Page 3 b) Starting A Manual Defrost Cycle (R & A Series) Page 4 c) Starting A Manual Defrost Cycle (G-Series) Page 5

III. Troubleshooting

a) Checking For Defective Sensors Page 6 b) Checking For Failed Relays Page 7 c) Checking For Other Failed Components Page 8 d) Checking For Iced Evaporator Coil Page 9 e) Proper Sensor Placement Page 10

IV. Control Architecture

a) R & A Series Refrigerator & Freezer Vertical Controllers Page 11-14 b) Undercounter Refrigerator & Freezer Horizontal Controllers Page 15 c) G-Series Refrigerator & Freezer Vertical Controllers Page 16-17 d) R & A Series Heated Cabinet Vertical Controllers Page 18-20

V. Removal/Installation

a) All Vertical Controllers Pages 21-22 b) All Horizontal Controllers Page 23

VI. Problem Diagnosis

a) How To Use Troubleshooting Trees Page 24 b) Hi-Temp Alarm (all HT/RI & LT/IF models) Page 25 c) Lo-Temp Alarm (all HT/RI & LT/IF models) Page 26 d) Door Open Alarm (all HT/RI, LT/IF HF/IH models) Page 27 e) Power Loss Alarm (all HT/RI, LT/IF HF/IH models) Page 28 f) System Leak Alarm (all HT/RI & LT/IF models) Page 29 g) Condenserclean Alarm (all HT/RI & LT/IF models) Page 30

VII. Accessing The Engineering Level Page 31

VIII. Control Parameters

a) Parameter Descriptions Page 32-33 b) Parameter Access & Units Of Measurement Page 34 c) G-Series Parameter Settings Page 35 d) R-Series Parameter Settings - Refrigerator Models Page 36 e) R-Series Parameter Settings - Freezer Models Page 37 f) Undercounter Parameter Settings Page 38

I. a - HOW TO USE THIS MANUAL:

Traulsen provides this manual as an aid to the service technician in installation, operation, and maintenance of INTELA-TRAUL® Controllers. When used properly, this service manual can help the service technician maintain, troubleshoot and diagnose most of the problems and malfunctions that may occur with the Controllers.

This manual covers the four different types of Controllers (Full Size Undercounter, G-Series, R&A Series Refrigerator & Freezer, and R&A Series Hot Food). These vary slightly from one another, all exceptions are noted, and where appropriate separate sections are provided.

While we believe that most aspects of the controllers are covered in this manual, should you encounter a condition not addressed, or require a wiring diagram please contact:

All service communication must include:

 Model Number & Serial Number Of Unit  A detailed explanation of the problem

Traulsen

4401 Blue Mound Road Fort Worth, TX 76106

Attn: Service Department

Phone: (800) 825-8220 or (817) 625-9671

Fax: (817) 740-6757

-2-

I. GENERAL INFORMATION

I. b - ABOUT INTELA-TRAUL:

The Traulsen INTELA-TRAUL and G-Series microprocessor controls are microprocessor based systems which replace several electromechanical components typically built into refrigeration products, such as: time clocks, thermometers, defrost limit switches and temperature controls, all combined into one solid state modular unit.

These microprocessor controls both monitor a cabinet air sensor and a coil sensor. The INTELA-TRAUL on the R & A Series also includes a discharge line sensor and a relative humidity sensor (H1 versions only). In conjuction with the programmed parameters of the control, and the information received, it cycles the refrigeration system ON and OFF at set temperatures, initiates and/or terminates defrost cycles, and initiates one of several alarm features if a problem is sensed (R & A Series only). R & A Series controls also allow the operator to cycle the door perimeter heaters ON/OFF as needed.

I. c - OPERATING THE CONTROLLER:

When operating the controller it is important to note that you only have approximately 20-30 seconds between button pushes. If you take longer than 30 seconds, the controller will revert back to displaying the cabinet temperature.If you enter the wrong security code, the controller will revert back to displaying the cabinet temperature. You can exit the parameters at any time by waiting 20-30 seconds for the control to return to normal operation.

Step 1: Press . Display will read “CUS.”

Step 2: Press . Display will read “000” with the left digit flashing.

Step 3: Press . Display will read “000” with the center digit flashing.

Step 4: Press until the center digit changes to an “A”.

Step 5: Press . Display will read “0A0” with the right digit flashing.

Step 6: Press until the right digit changes to an “1”.

Step 7: Press . Display will read “SPH”.

Step 8: Press again.

Step 9: Press or to adjust temperature to desired setting.

(NOTE: SPH should be set at 38 to 40°F for refrigerators and 0°F for freezers)

Step 10: When display reads the desired temperature press .

Step 11: Press until display reads “SPL”.

Step 12: Press .

Step 13: Press or to adjust temperature to desired setting.

(NOTE: SPL should be set at 34°F for refrigerators and -4°F for freezers)

Step 14: Press .

Step 15: Press to exit (R & A Series only). On G-Series models the

controller will automatically revert back to normal temperature display operation

after a delay of approximately 20-30 seconds.

SET

II. BASIC SERVICE PROCEDURES

The Display

Will Read

II. a - ADJUSTING THE TEMPERATURE:

SET

-3-

-4-

II. BASIC SERVICE PROCEDURES

II. b - STARTING A MANUAL DEFROST CYCLE (R & A Series):

The Display

Will Read

Step 1: Press . Display will read “CUS.”

Step 2: Press . Display will read “000” with the left digit flashing.

Step 3: Press . Display will read “000” with the center digit flashing.

Step 4: Press until the center digit changes to an “A”.

Step 5: Press . Display will read “0A0” with the right digit flashing.

Step 6: Press until the right digit changes to an “1”.

Step 7: Press . Display will read “SPH”.

Step 8: Press until the control reads “Sd,” Start Manual Defrost.

Step 9: Press . Display will read “n” (NO).

Step 10: Press or . Display will read “4” (YES).

Step 11: Press . Controller will display “SPH” for 30 seconds and

then “DEF” will appear.

SET

NOTE: Traulsen R & A Series refrigerator models also include an off- cycle defrost feature, which occurs once an hour. This is indicated by the control display, is time or temperature terminated, and generally is of 3 - 10 minutes in duration.

NOTE: The controller will automatically revert back to normal operation

after a delay of approximately 20-30 seconds.

SET

-5-

II. BASIC SERVICE PROCEDURES

II. c - STARTING A MANUAL DEFROST CYCLE (G-Series):

The Display

Will Read

NOTE: Traulsen G-Series refrigerator models also include an off-cycle defrost feature, which occurs once an hour. This is indicated by the control display, is time terminated, and is generally of 3 - 10 minutes in duration.

The defrost cycle on Traulsen G-Series freezer models can be either time or temperature terminated.

Step 1: Press . Display will read “CUS.”

Step 2: Press . Display will read “000” with the left digit flashing.

Step 3: Press . Display will read “000” with the center digit flashing.

Step 4: Press until the center digit changes to an “A”.

Step 5: Press . Display will read “0A0” with the right digit flashing.

Step 6: Press until the right digit changes to an “1”.

Step 7: Press . Display will read “SPH”.

Step 8: Press until the control reads “Sd,” Start Manual Defrost.

Step 9: Press . Display will read “n” (NO).

Step 10: Press or . Display will read “4” (YES).

Step 11: Press . Display will then read “SPH,” Start Manual Defrost.

Step 14: Press or to scroll to the next parameter, otherwise the

controller will automatically revert back to normal operation after a delay of

approximately 20-30 seconds.

SET

-6-

III. TROUBLESHOOTING

Step 1: Press . Display will read “CUS.”

Step 2: Press . Display will read “000” with the left digit flashing.

Step 3: Press . Display will read “000” with the center digit flashing.

Step 4: Press until the center digit changes to an “A”.

Step 5: Press . Display will read “0A0” with the right digit flashing.

Step 6: Press until the right digit changes to an “1”.

Step 7: Press .

Step 8: Press until display reads “EL”. Press .

If the display now reads “-40,” check for loose connection on the EVAPORATOR sensor. If the display has a very high reading such as “266,” replace the evaporator sensor.

NOTE: Erroneous readings may be the result of a faulty sensing circuit (open or

shorted) in the Controller.

Step 9: Press until the display reads “DL

”. Press .

In the event that the display now reads “-40,” check for a loose connection on the DISCHARGE LINE sensor. If the display has a reading of “220” or higher, check for lack of adequate air-flow through the condenser, a bad condenser motor, or any other condition around the unit which could cause a high temperature, such as a steam table or a crossdraft. Otherwise, proceed with replacing the DISCHARGE LINE sensor.

NOTE: Erroneous readings may be the result of a faulty sensing circuit (open or

shorted) in the Controller.

Step 10: Press until the display reads “AA

”. Press .

Display should read the approximate ambient air temperature behind the louver panel. If the display reads “111” check for a loose connection on the RH/AMBIENT AIR sensor. If the display reads “32.0” check the sensor for a short circuit.

NOTE: If display reads -40 or 266 the cabinet sensor is defective and requires

replacement.

NOTE: Ambient Air Sensor not included on MIT version controllers.

NOTE: Erroneous readings may be the result of a faulty sensing circuit (open or

shorted) in the Controller (on H1 control version only).

The Display

Will Read

III. a - CHECKING FOR DEFECTIVE SENSORS:

SET

1= DL is not included on G-Series controllers. 2= AA is not available with MIT version controllers.

-7-

III. TROUBLESHOOTING

III. b - CHECKING FOR FAILED RELAYS:

Checking For A Failed Internal Controller Relay:

1. Gain access to Controller compressor relay (see REMOVAL INSTRUCTIONS within this service manual for the specific type of controller your are servicing).

2. Locate the connector with the black/blue/purple wires and unplug it. Refer to the schematic on the side of the controller, or refer to the appropriate wiring diagram (to obtain this please contact the factory, referencing the serial numberof the unit involved).

3. Using a volt/ohm meter (VOM) with the power OFF, check the resistance across the black to blue wires of the Controller connector. If completed circuit is indicated (with no power to the Controller), the contacts are stuck closed and the Controller should be replaced (on MIT versions either the relay box or one of the other relays within the unit need to be replaced).

Checking For A Failed External “Slave” Relay or Solid State Relay (SSR), p/n 337-60360-01 (MIT II Only):

1. Gain access to the controller compressor relay (see REMOVAL INSTRUCTIONS within this service manual for the specific type of controller your are servicing).

2. Locate the external “slave” relay and unplug the harness connectors.

3. Using a volt/ohm meter (VOM), check the resistance from the “COM” terminal to the “NO” terminal. If a completed circuit is indicated, the contacts are stuck closed and the slave relay should be replaced.

4. For the SSR, remove the black and blue wires from terminals 3 & 4. Using a volt/ohm meter, and with the power OFF, measure the resistance across the terminals. A completed circuit indicates that the circuit is closed and that the relay should be replaced. A reading of 25 mΩ to 35 mΩ is considered normal for an open circuit in the SSR.

Checking For A Failed Door/Light Relay (R & A Series models only):

1. Gain access to Controller door relay (see REMOVAL INSTRUCTIONS within this service manual for the specific type of controller your are servicing).

2. Remove the wire from the door relay coil.

3. Using a volt/ohm meter (VOM), check across the relay contacts. If an open across the contacts is not indicated, replace the door relay.

NOTE: Equipment manufactured with the MIT II controller version do not include a Door/Light relay).

4. Physically check the switch for evidence of water. If switch has water in it, proceed with replacing the switch.

-8-

III. TROUBLESHOOTING

III. c - CHECKING FOR OTHER FAILED COMPONENTS:

Checking For A Failed Door Switch:

1. Remove the door(s) from the unit involved.

2. Locate the door switch, which is located behind the top door hinge(s).

3. Remove the switch from the cabinet.

4. Using a volt/ohm meter (VOM), check across the switch contacts. “COM” to “NO” should read open. If not, replace the switch.

5. Reinstall the switch and hinge onto the cabinet.

NOTE: If the unit has more than one door, check ALL door switches in the same manner as described in steps 1 thru 5 above.

Checking For A Failed Controller Transformer

(H1 & MIT I control versions only)

1. Check incoming voltage. Voltage at the unit must be within the ranges shown in the table below.

2. If the controller display does not come back on, use a volt/ohm meter (VOM) and check the output voltage of the controller transformer.

3. If the output voltage from the transformer is not within the range shown in the table above, replace the transformer. If the transformer tests OK, replace the controller instead.

4. For equipment manufactured with the MIT II controller version the transformer is mounted inside the relay module. Check between 17 and 8 on 18 pin connector on relay module for 12V DC.

Checking Cabinet, Coil or Discharge Line Sensors:

1. Gain access to CABINET, COIL or DISCHARGE LINE sensor and disconnect it.

2. Place tip if sensor probe in a mixture of icewater for several minutes. Allow enough time for sensor probe to aclimate to the icewater.

3. At 32°F, probe resistance shoud be 32.7K Ohms, +/- 10%. If resistance is not within this range, repalce the sensor.

VOLTAGE MIN MAX STANDARD 104 VAC 126 VAC 115/60/1 187 VAC 253 VAC 208-230/60/1

10.2 Volts 13.8 Volts Transformer (MIT 12.4) (MIT 14.7) Output Voltage

Replace

controller*

(see note below).

III. TROUBLESHOOTING

III. d - CHECKING FOR ICED EVAPORATOR COIL:

With

evaporator

clear of ice is

there proper

air-flow?

Check evaporator

blower motor for

proper operation.

Replace

evaporator

blower motor.

Evap’r

or ducting

restriction.

Remove restriction.

Check DEF settings in

controller parameters.

Go to pages 33-36.

Check coil sensors.

Go to pages 6, 7 & 8.

Reset

control

parameters

NO NOT OK

YES

NOT OK

Replace

failed

sensor.

NOT OK

Will unit enter manual defrost cycle?

Does

compressor

shut-off in

defrost?

Check defrost heater.

YES

Replace

compressor

relay or module.

YES

Will control

cycle unit at set

temps?

YES

Problem

with ref’n

system.

Check cabinet sensor.

Go to pages 6, 7 & 8.

NOT OK

-9-

Replace

failed

cabinet sensor.

*NOTE: See the corresponding pages to remove and replace the controller:

• R & A Series Refrigerator & Freezer Pages 21 - 22.

• G-Series Refrigerator & Freezer Pages 21 - 22.

• Undercounter Refrigerator & Freezer Page 23.

• R & A Series Hot Food Cabinets Pages 21 - 22.

III. TROUBLESHOOTING

III. e - PROPER SENSOR PLACEMENT:

Coil Sensor:

The coil sensor should be inserted into the return air side of the evaporator coil. On freezer models only this sensor should be centered approximately 2” (two inches) from the top (horizontally through coil - centered in coil).

On refrigerator models this sensor should be mounted on top of the coil.

Cabinet Air Sensor:

The cabinet air sensor should be mounted inside the evaporator housing (hump) on the return air side of the evaporator coil.

Discharge Sensor (R & A Series Only):

The discharge air sensor should be mounted on the hot gas side of the compressor. Placement should be as close to the compressor as possible and must be placed prior to the beginning of the hot gas loop. Please note that discharge sensors must be insulated.

-10-

Correct Sensor

Location

Correct

Sensor

Location

Correct

Sensor

Location

-11-

IV. CONTROL ARCHITECTURE

IV. a -

R & A SERIES REFRIGERATOR & FREEZER VERTICAL CONTROLLER:

NOTES: IRDA not included on equipment

manufactured with the MIT II control version.

See parts assembly on pages 12-13.

-12-

IV. CONTROL ARCHITECTURE

COIL SENSOR

P/N 337-60071-02

DISCHARGE SENSOR

P/N 337-60072-00

HORN

P/N 337-60070-00

CABINET SENSOR

P/N 337-60069-02

RH SENSOR

P/N 337-60080-00

(control versions H only)

3= Component can be ordered separately.

HOLDER CLIP

P/N 337-60038-00

HOLDER CLIP

P/N 337-60038-00

H1 CONTROLLER

TRANSFORMER/

RS485

DOOR RELAY

EVAP BLOWER

RELAY

POWER LINE IN 1

DEFROST COMPRESSOR

RELAY POWER LINE IN 2

DOOR

RELAY

CABINET

AIR

HORN

RH/AMBIENT

AIR

EVAP

COIL

DISCHARGE LINE

1= Set of two (can be ordered separately). 2= Requires unit model number and serial

number to place order.

BLUE SHRINK TUBE

YELLOW SHRINK TUBE

GREEN

SHRINK TUBE

IV. CONTROL ARCHITECTURE

IV. b -

R & A SERIES REFRIGERATOR & FREEZER VERTICAL CONTROLLER:

Parts assembly for H1 thru MIT control versions only

-13-

6 Door Switch

5 Line Neutral

4 Door Heater

3 Blower

2 Line Voltage

1 Defrost

337-60317-00

2 12 VDC Coil

1 12 VDC Coil

DC 12-2001

HOLDER CLIP

337-60038-00

(set of two)

CONTROL HEAD

R/A 337-60318-00

G 337-60319-00

HF 337-60320-00

UC/UL 337-60321-00

HORN

337-60070-00

CABINET SENSOR - 337-60069-02

COIL SENSOR - 337-60071-02

DISCHARGE SENSOR - 337-60072-00

TO TRANSFORMER

(not included for MIT II versions)

CONTROL CABLE

333-60250-00

RELAY BOX

337-60162-02

ADAPTER HARNESS

333-60249-00

TO DOOR RELAY

(door switch & line neutral)

TO DOOR HEATERS

(evap blower relay

power line in 1)

TO COMPRESSOR

& DEFROST RELAY

(power line in 2)

MIT CONTROL TROUBLE SHOOTING DIAGRAM

Date code will be listed

as the week-year (01-52)-

(2001-2100) when the

control is manufactured.

PIN connections may

not be available for

all model types.

Part numbers may

vary according to

model type.

Remove the 4 screws (one in each corner) & remove the relay box cover to expose pin connections & transformer with voltage setting jumper.

NOTE

All pins in this connection should

not read more than 20 VAC

Connector Pin No. Color Signal

1Gray Blower* 2 Orange Door Heater* 3 Green Alarm From Controller

4 5 6 Brown

7White/Purple -RS485

8Black Ground

9Yellow/Red 12 VAC

10 Blue Compressor*

11 Purple Defrost*

12 Yellow Door Open Signal

13 Red Power to Horn

14 Orange

15 White

16 Pink +RS485

17 Red 12 VDC to Controller

TO SSR COIL

CIRCUIT (MIT II ONLY)

337-60360-01 - see below

*Voltage should

not be more than

5 DC when

measured to

ground (pin 8).

-14-

IV. CONTROL ARCHITECTURE

IV. c -

UC & UL (UNDERCOUNTER) HORIZONTAL CONTROLLER:

COIL SENSOR

P/N 337-60071-02

DISCHARGE SENSOR

P/N 337-60072-00

HORN

P/N 337-60070-00

CABINET SENSOR

P/N 337-60069-02

3= Component can be ordered separately.

BLUE SHRINK TUBE

YELLOW SHRINK TUBE

GREEN

SHRINK TUBE

HOLDER CLIP

P/N 337-60038-00

HOLDER CLIP

P/N 337-60038-00

HORN

DISCHARGE

LINE

EVAP

COIL

NOT

USED

NOT

USED

CABINET

AIR

CONTROLLER

TRANSFORMER/RS485

DOOR HEATER EVAP

BLOWER RELAY

POWER LINE IN 1

DEFROST COMPRESSOR

RELAY POWER LINE IN 2

1= Set of two (can be ordered separately). 2= Requires unit model number and serial

number to place order.

-15-

IV. CONTROL ARCHITECTURE

IV. c -

UC & UL (UNDERCOUNTER) HORIZONTAL CONTROLLER:

Parts assembly for MIT control version only

HOLDER CLIP

337-60038-00

(set of two)

CONTROL HEAD

UC/UL 337-60321-00

HORN

337-60070-00

CABINET SENSOR - 337-60069-02

COIL SENSOR - 337-60071-02

DISCHARGE SENSOR - 337-60072-00

TO TRANSFORMER

(not included for MIT II versions)

CONTROL CABLE

333-60228-00

RELAY BOX

337-60172-02

ADAPTER HARNESS

HT = 333-60240-00 LT = 333-60225-00

UNUSED

EVAP BLOWER RELAY

(power line in 1)

TO COMPRESSOR

& DEFROST RELAY

(power line in 2)

6 Door Switch

5 Door Switch

4 Door Heater

3 Blower

2 Line Voltage

1 Defrost

337-60172-02

2 Compressor

1 Line Voltage

DC 12-2001

MIT CONTROL TROUBLE SHOOTING DIAGRAM

Date code will be listed

as the week-year (01-52)-

(2001-2100) when the

control is manufactured.

PIN connections may

not be available for

all model types.

Part numbers may

vary according to

model type.

Revision Level

Remove the 4 screws (one in each corner) & remove the relay box cover to expose pin connections & transformer with voltage setting jumper.

NOTE

All pins in this connection should

not read more than 20 VAC

Connector Pin No. Color Signal

1Gray Blower* 2 Orange Door Heater* 3 Green Alarm From Controller

4Black Return From Horn 5 6

7White/Purple -RS485

8Black Ground

9White 12 VAC

10 Blue Compressor*

11 Purple Defrost*

12 Yellow Door Open Signal

13 Red Power to Horn

16 Pink +RS485

17 Red 12 VDC to Controller

18 Black 12 VAC

*Voltage should not be more than 5 DC when measured to ground (pin 8).

-16-

IV. CONTROL ARCHITECTURE

IV. d -

G-SERIES REFRIGERATOR & FREEZER VERTICAL CONTROLLER:

-17-

IV. CONTROL ARCHITECTURE

IV. d -

G-SERIES REFRIGERATOR & FREEZER VERTICAL CONTROLLER:

-18-

IV. CONTROL ARCHITECTURE

IV. e -

R-SERIES HEATED CABINET VERTICAL CONTROLLER:

HOT FOOD CABINET START-UP (pre-MIT version):

When power is first applied to the unit, you must set the temperature by pressing the “SET” and “UP ARROW” buttons at the same time using equal pressure with both thumbs, until the temperature appears on the display. Next, use the “UP” button to reach the desired temperature (maximum 180°), then press and release the “SET” button to lock it in.

After this is done you can turn the control ON and OFF by pressing and releasing the “ALARM CANCEL” button.

Be aware to watch for the display constantly reading “OFF”. This is an indication of a possible faulty cabinet sensor. To remedy, replace the sensor and reset the operating temperature.

HOT FOOD CABINET START-UP (MIT version):

The MIT control offers an additional means of turning the cabinet heaters ON and OFF. After the operating temperature has been set, the operator can continuously turn the unit OFF and then back ON again to the same operating temperature by pressing the “ON/OFF” button on the face of the control.

Please note that this feature will not function if the control is in an alarm state with the alarm LED illuminated.

NOTES: IRDA not included on equipment

manufactured with MIT II control version.

See parts assembly on pages 17-18.

1= Set of two (can be ordered separately). 2= Requires unit model number and serial

number to place order.

-19-

IV. CONTROL ARCHITECTURE

HORN 337-60070-00

IV. e -

R-SERIES HEATED CABINET VERTICAL CONTROLLER:

Parts assembly for H1 control versions only

-20-

IV. CONTROL ARCHITECTURE

IV. e -

R-SERIES HEATED CABINET VERTICAL CONTROLLER:

Parts assembly for MIT control versions only

HOLDER CLIP

337-60038-00

(set of two)

CONTROL HEAD

HF 337-60320-00

HORN

337-60070-00

CABINET SENSOR - 337-60069-02

UNUSED

TO TRANSFORMER

(not included for MIT II versions)

CONTROL CABLE

333-60228-00

RELAY BOX

337-60171-02

ADAPTER HARNESS

333-60225-00

TO DOOR RELAY

UNUSED

TO HEATERS

UNUSED

6 Door Switch

5 Line Neutral

4 Door Heater

3 Blower

2 Line Voltage

1 Defrost

337-60371-00

2 12 VDC Coil

1 12 VDC Coil

DC 12-2001

MIT CONTROL TROUBLE SHOOTING DIAGRAM

Date code will be listed

as the week-year (01-52)-

(2001-2100) when the

control is manufactured.

PIN connections may

not be available for

all model types.

Part numbers may

vary according to

model type.

Revision Level

Remove the 4 screws (one in each corner) & remove the relay box cover to expose pin connections & transformer with voltage setting jumper (MIT II version only).

NOTE

All pins in this connection should

not read more than 20 VAC

Connector Pin No. Color Signal

1Gray Blower* 2 Orange Door Heater* 3 Green Alarm From Controller

4Black Return To Horn 5 6

7White/Purple -RS485

8Black Ground

9White 12 VAC

10 Blue Compressor*

11 Purple Defrost*

12 Yellow Door Open Signal

13 Red Power to Horn

16 Pink +RS485

17 Red 12 VDC to Controller

18 Black 12VAC

*Voltage should

not be more than

5 DC when

measured to

ground (pin 8).

V. REMOVAL/INSTALLATION

V. a -

ALL VERTICAL CONTROLLERS:

To remove INTELA-TRAUL® (p/n’s 337-60090-00, 337-60091-00 and 337-60092-00) and G-Series (p/n’s 337-60093-00, 337-60094-00 and 337-60095-00) Vertical Controller from the unit in which it is installed, proceed as follows (If unable to access the unit from the rear perform steps 1 through 3, otherwise, proceed to step 4):

-21-

1. At front of unit, remove two (2) slot head thumb screws from bottom corners of louver assembly. Set thumbscrews aside.

2. Swing louver assembly up and away from front of unit until it stops.

3. Remove two (2) Slot head thumbscrews from top of louver assembly. Set thumbscrews and louver assembly aside.

-22-

V. REMOVAL/INSTALLATION

4. At the top of the junction box, remove three (3) Phillips head screws. Set screws aside.

5. Locate one (1) Phillips head screw at bottom of junction box, and remove. Set screw aside.

6. Carefully slide junction box away from front of unit until all wiring and connections to the controller are exposed.

7. Locate all nine (9) Controller connections (five for G-Series), then carefully disconnect each one.

8. Firmly grasp and compress the rounded portion of the middle prong on each holder clip. Slowly slide each holder clip off the controller. Set clips aside.

9. Slowly pull Controller through mounting hole and set aside.

WARNING: DISCONNECT ALL POWER BEFORE PROCEEDING

TO RE-INSTALL CONTROLLER,

REVERSE THE PRECEEDING

PROCEDURE.

NOTE:

Be sure ALL components

have been disconnected

from the Controller before

performing the next step.

CONTROLLER

PULL CONTROLLER

IN THIS DIRECTION

(3) PHILLIPS

HEAD SCREWS

(1) PHILLIPS

HEAD SCREW

JUNCTION

BOX

REAR VIEW

OF UNIT

CONNECTIONS

CONTROLLER

JUNCTION

BOX

(relay junction

box shown

turned 90

degrees)

MIDDLE PRONG

HOLDER

CLIP

HOLDER

CLIP

-23-

V. REMOVAL/INSTALLATION

V. a -

ALL HORIZONTAL CONTROLLERS:

To remove INTELA-TRAUL® (p/n’s 337-60096-00 and 337-60097-00) Horizontal Controller from the unit in which it is installed, proceed as follows:

1. Check to make sure that the power cable is disconnected from the wall.

2. Remove the four (4) black plugs that are located in each corner of the power pack louver assembly. Set plugs aside.

3. Remove the four (4) Phillips head screws holding the louver assembly in place. Set screws and louver assembly aside.

4. Remove the two (2) Phillips head screws thathold the Controller and the bracket assembly to the condenser fan assembly. Set screws aside.

5. Locate all nine (9) Controller connections, then carefully disconnect each one.

6. Firmly grasp and compress the rounded portion of the middle prong on each holder clip. Slowly slide each holder clip off the Controller. Set clips aside.

WARNING: DISCONNECT ALL POWER BEFORE PROCEEDING

TO RE-INSTALL CONTROLLER,

REVERSE THE PRECEEDING

PROCEDURE.

(4) PHILLIPS

HEAD SCREWS

LOUVER ASSEMBLY

(4) BLACK PLASTIC

PLUGS

MOUNTING

BRACKET

(2) PHILLIPS

HEAD SCREWS

MIDDLE

PRONG OF

HOLDER CLIP

(one on each side

of the controller)

MIDDLE

PRONG OF

HOLDER CLIP

(one on each side

of the controller)

MOUNTING

BRACKET

(2) PHILLIPS

HEAD SCREWS

GUIDE SLOTS

(one on each side

of the controller)

-24-

VI. PROBLEM DIAGNOSIS

QUESTION CHECK SOLUTION

VI. a - HOW TO USE THE TROUBLESHOOTING TREES:

The troubleshooting trees on the following pages were developed as an aid to the service technician in determining the exact solution to a certain problem or malfunction. When used as designed, the troubleshooting trees can lead you from a general symptom to the most likely component to suspect as the cause of the problem.

The trees are made up of three different types of boxes:

QUESTION

Boxes ask a yes/no question and the answer will lead to either another question box, a check box, or a solution box.

CHECK

Boxes will suggest a point to check for proper operation, and will often refer you to a page in either the SERVICE INFORMATION or the REMOVAL/INSTALLATION sections of this manual. The result of the check may lead to another box, or a solution box.

SOLUTION

Boxes suggest the most likely component to cause the malfunction described in the heading of the tree. When reaching a solution box, do not immediately assume the component is defective. The final step is to use the SERVICE INFORMATION section of this manual to verify that the component is defective.

To use the troubleshooting trees, first find the page with the heading describing the type of problem occurring. Begin at the top of the page and follow the tree, step-by-step. When a check box is reached, refer to the suggested section to make the check suggested. Once a solution box is reached, refer to the suggested section to verify that the component in the solution box is indeed defective, and repair or replace per the direction in that section.

-25-

VI. b- HIGH TEMPERATURE ALARM

Door(s) open longer than 5

minutes?

Check compressor

for low refrigerant.

YES

door(s).

Excessive

amount of hot

product placed

in unit?

YES

Reduce

volume of

hot product.

Is evaporator

coil frozen up?

YES

Defrost

evaporator

coil.

IS OK

Check that sensor

probe(s) properly

connected.

YES

IS NOT OK

Add

refrigerant.

IS NOT OK

Connect

probe(s).

Replace

failed

sensor.

1= See procedure on page 9.

-26-

VI. c- LOW TEMPERATURE ALARM

Is temperature

setting for unit

too low?

Check for failed

compressor relay.

YES

Increase

operating

temperature.

Is there food

product in the

unit?

YES

Add

product

to the unit.

IS NOT OK

Replace

failed

controller or

slave relay.

IS OK

Check that sensor

probe(s) properly

connected.

YES

IS NOT OK

Replace

failed

sensor.

Connect

probe(s).

NOTE ON HOT FOOD UNITS ONLY

Hot food units are designed to hold hot food at set temperature. The cabinet is not designed to heat cold products.

-27-

VI. d- DOOR OPEN ALARM

Checkfor a failed door/

light relay.

Door(s) open longer than 5

minutes?

YES

door(s).

IS OK

IS NOT OK

Replace

failed relay.

Check for mis-wired

door switch.

Is there water

in the door

switch?

YES

Replace

door

switch.

IS NOT OK

Replace

door

switch.

1= H1 and MIT 1 control versions only. 2= See procedure on page 7.

-28-

VI. e- POWER LOSS ALARM

Is unit

plugged

in?

YES

Plug

unit in.

Has unit

suffered a loss

of power due to

bad weather?

YES

Full

operation

will return

when service

is restored.

Is unit

receiving low

voltage input?

YES

Contact

local utility

provider.

Check for failed

controller transformer.

IS NOT OK

Replace

controller

transformer.

1= See procedure on page 8.

-29-

VI. f- SYSTEM LEAK ALARM

Does

discharge temp

rise 45°F within

5 min. of a ref’n.

cycle start?

YES

Add

refrigerant.

Check compressor

for low refrigerant.

IS OK

Check discharge

line sensor.

Replace

failed

sensor.

IS NOT OK

Are sensor

probes properly

connected?

YES

Check for disolocated

sensor probe(s).

YES

Connect

Probes.

Relocate

probe(s) to

proper position.

1= See procedure on page 8.

-30-

VI. g - CONDENSERCLEAN ALARM

condenser

coil dirty?

YES

Clean

condenser

coil.

condenser fan

disconnected?

YES

Properly

conenct fan.

Check forfailed condenser fan.

IS NOT OK

Replace

fan.

Are there

any obstructions

at top or rear

of unit?

YES

Remove

obstructions.

Is the room

temperature

too warm?

YES

Lower

the room

temperature.

Is air-flow

restricted by

any objects?

YES

Move

unit or

objects for

better air-flow.

Step 1: Press . Display will read “CUS.”

Step 2: Press until “EnG” is displayed.

Step 3: Press . Display will read “000” with the left digit flashing.

Step 4: Press until the left digit changes to an “9”.

Step 5: Press . Display will read “900” with the center digit flashing.

Step 6: Press until the center digit changes to an “9”.

Step 7: Press . Display will read “990” with the right digit flashing.

Step 8: Press until the right digit changes to an “E”.

Step 9: The display will read (99E), press .

Step 10: Press . The display will now read “FOC”

- See Note.

NOTE: R & A Series Only, for G-Series models press for the

control to display “FOC.”

SET

The Display

Will Read

SET

-31-

VII. ACCESSING THE ENGINEERING LEVEL

VII. a - ACCESSING THE ENGINEERING LEVEL: Not all control parameters can be adjusted at the customers level of access. To adjust these other parameters it is first necessary to gain access to the ENGINEERING LEVEL. Please follow the below procedure in order to enter this level.

FOC 3-digit code which identifies the .hex file loaded at the factory. ADR Device address for NAFEM networks. BAU Communications rate when connected into a NAFEM network. NAF Allow the control to communicate with a NAFEM network. SPH High value of desired cabinet temperature range. SPL Low value of desired cabinet temperature range. SHL Lowest temperature of allowed range for setting of SPH. SHH Highest temperature of allowed range for setting of SPH. SLL Lowest temperature of allowed range for setting of SPL. SLH Highest temperature of allowed range for setting of SPL. RO Difference, in degrees, between displayed & measured temperature. HI The highest temperature the cabinet air temperature is allowed to reach before

triggering a High-Temp alarm.

LO The lowest temperature the cabinet air temperature is allowed to reach before

triggering a Low-Temp alarm. SCL Sets the temperature display scale (fahrenheit or celsius). HAD Time, in minutes, that the controller delays triggering the High-Temp alarm at any

start-up or at the end of a defrost cycle. LAD Time, in minutes, that the controller delays triggering the Low-Temp alarm if

cabinet air temperature equal or below SPL setting. AC The amount of time, in minutes, that the compressor must be off between cycles. DEF Defines the type of heat used to defrost the coil: Electric, Hot Gas, None or

Off-Cycle. IBD The amount of time, in hours, between the end of the drip time& start of the next

defrost cycle. DDC The maximum amount of time, in minutes, that the heat will be on during a defrost

cycle. CDE The temperature of the evaporator coil that indicates the end of a defrost heat

cycle. DDE The amount of time, in minutes, between the defrost heat being turned off and the

compressor turning on. BDD The delay time, in minutes, between the end of the drip time and and before the

evaporator blower turns on. BSD The temperature of the evaporator coil that triggers the evaporator blower to turn

on after drip time ends. ODD The maximum amount of time, in minutes, that the display will read the last

temperature recorded before entering the defrost cycle. SD Allows a techinician to start or stop a defrost cycle. CFA Alows the customer to turn the clogged filter alram ON/OFF ( R & A Series only). CCR The minium amount of time, in minutes, that the compressor must be running

before generating a clogged filter alarm. CDL The discharge line temperature that will trigger a clogged filter alarm. DOA Allows the customer to turn the door open alarm ON/OFF in units equipped with

the appropriate hardware. DAD The time, in minutes, that a door must be open before triggering a door open

alarm.

-32-

VIII. CONTROL PARAMETERS

VIII. a - PARAMETER DESCRIPTIONS:

-33-

APD The amount of time, in seconds, that a visual alarm text will be displayed. ATD Alarm temperature delay. AAS Allows the customer to set the type of audible alarm style, either Blast, OFF or

Continuous. CL Allows the customer to set the time of day. DAY Allows the customer to set the date. DS Sets daylight savings time On or OFF. DL1 Selects the time to start a defrost lockout. DL2 Selects the time to start a defrost lockout. DL3 Selects the time to start a defrost lockout. DL4 Selects the time to start a defrost lockout. DCF Allows the customer to set the percentage of time that the door perimeter heaters

will operate, to control surface condensation. CON The amount of time the compressor will run in the event of a cabinet air sensor

failure. COF The amount of time, in minutes, that the compressor will be OFF in the event of a

cabinet air sensor failure. EL Displays the evaporator temperature at the time (press set or the up arrow button

to display this feature). DL Displays the discharge line temperature at the time (press set or the up arrow

button to display this feature). CB When activated (by pressing the set or up arrow buttons), will display the cabinet

air temperature at the time the button is pressed. PLn When activated will display the approximate line voltage. RCO Will energize the compressor relay for 10 seconds when activated. RdF Will energize the heater relay for 10 seconds when activated. RFA Will energize the blower relay for 10 seconds when activated. RDH Will energize the door heater relay for 10 seconds when activated. Pro Parameter used only when reflashing the program memory. CEP When activated, will return all of the parameters to the initial factory settings. REF Displays the revision level of the software loaded into memory.

VIII. CONTROL PARAMETERS

VIII. a - PARAMETER DESCRIPTIONS (continued):

VIII. CONTROL PARAMETERS

VIII. b - PARAMETER ACCCESS & UNITS OF MEASUREMENT:

Control Unit of Parameter Description Access Measure ADR* Device Address ENG BAU* Comm. Baud Rate in K ENG KBaud NAF* NAFEM Communications Enable ENG On/Off SPH Temperature Set-Point High CUS Degree SPL Temperature Set-Point Low CUS Degree SHL Set-Point High/Low ENG Degree SHH Set-Point High/High ENG Degree SLL Set-Point Low/Low ENG Degree SLH Set-Point Low/High ENG Degree RO Room Offset CUS Degree HI Upper Temperature Limit ENG Degree LO Lower Temperature Limit ENG Degree SCL Temperature Scale CUS F or C HAD High-Temperature Alarm Delay ENG Minute LAD Low-Temperature Alarm Delay ENG Minute AC Anticylcing ENG Minute DEF Defrost Type ENG Electric/Gas/Off IBD Intervals Between Defrosts ENG Hours DDC Maximum Defrost Duration ENG Minute CDE Coil Temperature At End of Defrost Cycle ENG Degree DDE Drip Time At End of Defrost Cycle ENG Minute BDD Blower Delay At Drip Time ENG Minute BSD BSD After Defrost End ENG Degree ODD Display Hold After Defrost ENG Minute SD Start/Stop Defrost CUS Start/Stop CFA Clogged Filter Alarm n/a On/Off CCR Clogged Filter Compressor Run Time n/a Minute CDL Clogged Filter Alarm Temperature n/a Degree DOA Door Open Alarm ENG On/Off DAD Door Display Alarm Delay ENG Minute APD Alarm Pause Delay ENG Second ATD Alarm Temperature Delay ENG Second AAS Audible Alarm Style CUS On/Off CL Set The Clock Time CUS H/N/S DAY Set The Clock Date CUS Y/N/D DS Daylight Savings CUS On/Off DL1 Defrost Lockout 1 CUS Time/Off DL2 Defrost Lockout 2 CUS Time/Off DL3 Defrost Lockout 3 CUS Time/Off DL4 Defrost Lockout 4 CUS Time/Off DCF Dewpoint Correction Factor CUS % CON Compressor Default On Time ENG Minute COF Compressor Off Time ENG Minute EL Evaporator Coil Temperature CUS Degree DL Discharge Line Temperature CUS Degree CB Cabinet Air Temperature CUS Degree PLn* Display Line Voltage ENG Volts RCO* Cycle Compressor Relay ENG On/Off RdF* Cycle Defrost Relay ENG On/Off RFA* Cycle Blower/Fan Relay ENG On/Off RDH* Cycle Door Heater Relay ENG On/Off PRO* Go To Bootloader For Programming ENG CEP* Clear EEPROM & Load Defaults ENG REF* Software Version/Revision/Step n/a

-34-

H1, MIT I & MIT II CONTROL VERSIONS ONLY

*MIT II control version only.

-35-

VIII. c - G-SERIES PARAMETER SETTINGS (MIT II Control Version):

Control Freezer Models Refrigerator Models Parameter GF1 GF2 GF3 GF4 GR1 GR2 GR3 ADR* 2 2 2 2 2 2 2 BAU* 9.6 9.6 9.6 9.6 9.6 9.6 9.6 NAF* ON ON ON ON ON ON ON SPH -5.2 0.1 0.1 32 38.1 39.2 39.2 SPL -10 -4 -4 26.1 34 37 37 SHL -8 -3.1 -3.1 30.2 36 39.2 39.2 SHH -5.2 0.1 0.1 34 40 40 40 SLL -13 -6.2 -6.2 26.1 32 34 34 SLH -10 -4 -4 28 34 37 37 RO 0 000 000 HI 0.1 5 5 35.2 41 41 41 LO -18.4 -10 -10 20 30.2 30.2 30.2 SCL F FFF FFF HAD n/a n/a n/a n/a n/a n/a n/a LAD n/a n/a n/a n/a n/a n/a n/a AC 3 333 333 DEF ELE ELE ELE ELE OFF ELE OFF IBD 4.0 4.0 4.0 4.0 1.0 2.0 1.0 DDC 20 20 20 20 10 20 10 CDE 75 75 75 75 45.1 70 45.1 DDE 2 222 222 BDD 1 111 000 BSD 32 32 32 32 32 32 32 ODD 10 10 10 10 10 10 10 SD

Starts a new defrost cycle at any time or stops a current defrost cycle. CFA n/a n/a n/a n/a n/a n/a n/a CCR n/a n/a n/a n/a n/a n/a n/a CDL n/a n/a n/a n/a n/a n/a n/a DOA n/a n/a n/a n/a n/a n/a n/a DAD n/a n/a n/a n/a n/a n/a n/a APD n/a n/a n/a n/a n/a n/a n/a ATD n/a n/a n/a n/a n/a n/a n/a AAS n/a n/a n/a n/a n/a n/a n/a CL Set the hours and minutes in military time. DAY Set the year, month, day of the month and day of the week. DS ON ON ON ON ON ON ON DL1 OFF OFF OFF OFF OFF OFF OFF DL2 OFF

11:30am

OFF OFF OFF OFF OFF

DL3 OFF

5:30pm

OFF OFF OFF OFF OFF DL4 OFF OFF OFF OFF OFF OFF OFF DCF n/a n/a n/a n/a n/a n/a n/a CON 19 19 19 19 11 11 11 COF 7 7 7 7 10 10 10 EL

Will display evaporator coil temp in real time every time an arrow is pressed.

Will display discharge line temp in real time every time an arrow is pressed.

Will display cabinet air temp in real time every time an arrow is pressed.

PLn*

Will display power line voltage in real time every time an arrow is pressed.

RCO*

Turns ON/OFF the compressor relay for 10-seconds or until an arrow is pressed.

RdF*

Turns ON/OFF the defrost relay for 10-seconds or until an arrow is pressed.

RFA*

Turns ON/OFF the blower relay for 10-seconds or until an arrow is pressed.

RDH*

Turns ON/OFF the door heater triac for 10-seconds or until an arrow is pressed. PRO* Set the controller in receiving mode for programming. CEP* Clear all controller memories and reloads the factory default parameters. REF*

Firmware revision in the format X9.9 (X=version, 9=major revision, 9=minor revision).

VIII. CONTROL PARAMETERS

*MIT II control version only.

-36-

VIII. CONTROL PARAMETERS

VIII. d - R-SERIES PARAMETER SETTINGS (MIT II Control Version):

Control Refrigerator Models Parameter RA1 RA2 RA3 RA4 RA5 RA6 RA7 RA8 ADR 2 2222222 BAU 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 NAF ON ON ON ON ON ON ON ON SPH 39.2 39.2 39.2 39.2 38.1 38.1 39.2 39.2 SPL 37 37 37 37 34 34 37 37 SHL 39.2 39.2 39.2 39.2 36 36 39.2 39.2 SHH 40 40 40 40 40 40 40 40 SLL 34 34 34 34 32 32 34 34 SLH 37 37 37 37 34 34 37 37 RO 0 0000000 HI 41 41 41 41 41 41 41 41 LO 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 SCL F FFFFFFF HAD 15 15 15 15 15 15 15 15 LAD 2 2222222 AC 3 3333333 DEF OFF OFF OFF OFF OFF OFF ELE ELE IBD 1.0 1.0 1.0 1.0 1.0 1.0 2.0 2.0 DDC 10 10 10 10 10 10 20 20 CDE 45.1 45.1 45.1 45.1 45.1 45.1 70 70 DDE 2 2222222 BDD 0 0000000 BSD 32 32 32 32 32 32 32 32 ODD 10 10 10 10 10 10 10 10 SD

Starts a new defrost cycle at any time or stops a current defrost cycle. CFA OFF ON OFF ON ON ON OFF ON CCR 20 20 20 20 20 20 20 20 CDL 220.1 220.1 220.1 220.1 220.1 220.1 220.1 220.1 DOA ON ON ON ON ON ON ON ON DAD 15 15 15 15 15 15 15 15 APD 2 2222222 ATD 10 10 101010101010 AAS OFF OFF OFF OFF OFF OFF OFF OFF CL Set the hours and minutes in military time. DAY Set the year, month, day of the month and day of the week. DS ON ON ON ON ON ON ON ON DL1 OFF OFF OFF OFF OFF OFF OFF OFF DL2 OFF OFF OFF OFF OFF OFF OFF OFF DL3 OFF OFF OFF OFF OFF OFF OFF OFF DL4 OFF OFF OFF OFF OFF OFF OFF OFF DCF 100 100 100 100 100 100 100 100 CON 11 11 11 11 11 11 11 11 COF 10 10 10 10 10 10 10 10 EL

Will display evaporator coil temp in real time every time an arrow is pressed. DL

Will display discharge line temp in real time every time an arrow is pressed. CB

Will display cabinet air temp in real time every time an arrow is pressed. PLn*

Will display power line voltage in real time every time an arrow is pressed. RCO*

Turns ON/OFF the compressor relay for 10-seconds or until an arrow is pressed. RdF*

Turns ON/OFF the defrost relay for 10-seconds or until an arrow is pressed. RFA*

Turns ON/OFF the blower relay for 10-seconds or until an arrow is pressed. RDH*

Firmware revision in the format X9.9 (X=version, 9=major revision, 9=minor revision).

*MIT II control version only.

-37-

VIII. CONTROL PARAMETERS

VIII. e - R-SERIES PARAMETER SETTINGS (MIT II Control Version):

Control Freezer Models Parameter RF1 RF2 RF3 RF4 RF5 ADR 2 2222 BAU 9.6 9.6 9.6 9.6 9.6 NAF ON ON ON ON ON SPH -15.4 -10 0.1 0.1 -5.2 SPL -20.2 -15.4 -4 -4 -10 SHL -15.4 -13.6 -2.2 -2.2 -8 SHH -10 -10 0.1 0.1 -5.2 SLL -20.2 -20.2 -6.2 -6.2 -13 SLH -17 -15.4 -4 -4 -10 RO 0 0000 HI 5.2 5.2 5 5 0.1 LO -25.6 -25.6 -10 -10 -17.8 SCL F FFFF HAD 15 15 15 15 15 LAD 2 2222 AC 3 3333 DEF ELE ELE ELE ELE ELE IBD 4.0 4.0 4.0 4.0 4.0 DDC 30 20 20 20 20 CDE 55 75 75 70 70 DDE 5 2222 BDD 1 1111 BSD -10 32 32 32 32 ODD 10 10 10 10 10 SD

Starts a new defrost cycle at any time or stops a current defrost cycle. CFA ON OFF OFF ON ON CCR 20 20 20 20 20 CDL 220.1 220.1 220.1 220.1 220.1 DOA ON ON ON ON ON DAD 15 15 15 15 15 APD 2 2222 ATD 10 10 101010 AAS OFF OFF OFF OFF OFF CL Set the hours and minutes in military time. DAY Set the year, month, day of the month and day of the week. DS ON ON ON ON ON DL1 OFF OFF OFF OFF OFF DL2 OFF OFF OFF OFF OFF DL3 OFF OFF OFF OFF OFF DL4 OFF OFF OFF OFF OFF DCF 100 100 100 100 100 CON 19 19 19 19 19 COF 7 7777 EL

Will display evaporator coil temp in real time every time an arrow is pressed. DL

Will display discharge line temp in real time every time an arrow is pressed. CB

Will display cabinet air temp in real time every time an arrow is pressed. PLn

Will display power line voltage in real time every time an arrow is pressed. RCO

Turns ON/OFF the compressor relay for 10-seconds or until an arrow is pressed. RdF

Turns ON/OFF the defrost relay for 10-seconds or until an arrow is pressed. RFA

Turns ON/OFF the blower relay for 10-seconds or until an arrow is pressed. RDH

Turns ON/OFF the door heater triac for 10-seconds or until an arrow is pressed. PRO Set the controller in receiving mode for programming. CEP Clear all controller memories and reloads the factory default parameters. REF

Firmware revision in the format X9.9 (X=version, 9=major revision, 9=minor revision).

-38-

VIII. CONTROL PARAMETERS

VIII. f - UNDERCOUNTER PARAMETER SETTINGS (MIT II Control Version):

Control Parameter UF1 UF2 UP1 UP2 ADR 2 2 2 2 BAU 9.6 9.6 9.6 9.6 NAF ON ON ON ON SPH 0.1 38.1 38.1 38.1 SPL -4 33.8 33.8 33.8 SHL -0.31 36 36 36 SHH 0.1 40 40 40 SLL -6.2 32 32 32 SLH -4 34 34 34 RO 0 0 0 0 HI 5 41 41 41 LO -10 30.2 30.2 30.2 SCL F F F F HAD 15 15 15 15 LAD 2 2 2 2 AC 3 3 3 3 DEF GAS GAS OFF OFF IBD 4.0 4.0 1.0 1.0 DDC 20 20 10 10 CDE 75 75 45.1 45.1 DDE 5 2 2 2 BDD 1 1 0 0 BSD -10 32 32 32 ODD 10 10 10 10 SD

Starts a new defrost cycle at any time or stops a current defrost cycle. CFA OFF OFF N/A OFF CCR 20 20 N/A 20 CDL 220.1 220.1 N/A 220.1 DOA OFF OFF N/A OFF DAD 15 15 N/A 15 APD 2 2 2 2 ATD 10 10 N/A 10 AAS OFF OFF N/A OFF CL Set the hours and minutes in military time. DAY Set the year, month, day of the month and day of the week. DS ON ON ON ON DL1 OFF OFF OFF OFF DL2 OFF OFF OFF OFF DL3 OFF OFF OFF OFF DL4 OFF OFF OFF OFF DCF 100 100 100 100 CON 19 19 11 11 COF 7 7 10 10 EL