Frymaster UHC-HD User Manual

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Manual Parts Service,

UHC

3 6, for

HD-

Models Row-

 

 

 

Frymaster, a member of the Commercial Food Equipment Service Association, recommends using CFESA Certified Technicians.

*8196606*

1-800-551-8633

Price: $6.00

OCT 10

 

24-Hour Service Hotline

819-6606

 

 

NOTICE

IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS ENODIS EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART PURCHASED DIRECTLY FROM FRYMASTER DEAN, OR ANY OF ITS AUTHORIZED SERVICE CENTERS, AND/OR THE PART BEING USED IS MODIFIED FROM ITS ORIGINAL CONFIGURATION, THIS WARRANTY WILL BE VOID. FURTHER, FRYMASTER DEAN AND ITS AFFILIATES WILL NOT BE LIABLE FOR ANY CLAIMS, DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER WHICH ARISE DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF ANY MODIFIED PART AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICE CENTER.

THE CABINET IS NOT SUITABLE FOR OUTDOOR USE. WHEN OPERATING THIS UNIT, IT

MUST BE PLACED ON A HORIZONTAL SURFACE.

THE CABINET IS NOT SUITABLE FOR INSTALLATION IN AN AREA WHERE A WATER JET CAN BE USED. THIS APPLIANCE MUST NOT BE CLEANED WITH A WATER JET.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN

THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

DO NOT OPERATE OR SERVICE THE CABINET WITHOUT FIRST READING THIS MANUAL.

DO NOT OPERATE THE CABINET UNLESS IT HAS BEEN PROPERLY INSTALLED AND

CHECKED.

DO NOT OPERATE THE CABINET UNLESS ALL SERVICE AND ACCESS PANELS ARE IN

PLACE AND PROPERLY SECURED.

DO NOT ATTEMPT TO REPAIR OR REPLACE ANY COMPONENT OF THE CABINET UNLESS

ALL POWER TO THE UNIT HAS BEEN DISCONNECTED.

USE CAUTION WHEN SETTING UP, OPERATING, OR CLEANING THE CABINET TO AVOID

CONTACT WITH HEATED SURFACES.

USE CAUTION WHEN LIFTING THE UHC-D. THE UNIT WEIGHS 200 POUNDS. THREE TO FOUR PEOPLE, USING STANDARD SAFE LIFTING PRACTICES, WILL BE NECESSARY TO HANDLE THE CABINET.

Table of Contents

Theory of Operation

1-1

Service/Software Procedures

2-1

Troubleshooting

3-1

Illustrated Parts List

4-1

Wiring Diagrams

5-1

Cabinet Service Procedures

1 Functional Description

Master Control Display

Power switch

Timer: displays on row board remaining time for all active timers.

Temperature: displays on Row Mode key row board plate

temperature, alternating

between top and bottom.

Timer key

Note: The illustrations for these service procedures are of the 6 row full size UHC HD.

1.2 Theory of Operation

The cabinet operates on 208-250VAC 50 or 60 cycle single-phase power. The main switch activates a relay, which supplies line voltage to two distribution boards, three cooling fans and a power supply. The power supply provides 5VDC to the master control board and the distribution boards.

A ribbon cable connects the master control board to both distribution boards. Ribbon cables also connect the distribution boards to the displays. The resistance of RTD’s, attached to the heater plates, is monitored by the distribution boards. The board switches power through solid-state relays to the heater plates when the resistance, which is used as an indicator of temperature, falls out of the range for the product held in the cabinet.

The switch, relay, master control, master control board, LON board, LON filter, cooling fans and power supply are mounted under the top of the unit. The cabinet is programmed using the key pad on the front bezel.

1-1

Cabinet Service Procedures

1.3 Start Up Indicators and Test Points

Distribution boards shown with ribbon cables removed.

Upon startup, the cabinet beeps. LED’s on the distribution boards flash. The displays show the version number of the cabinet’s firmware and then the row’s status.

1-2

Cabinet Service Procedures

2 Service Procedures

DANGER: Failure to disconnect power from the unit before servicing could result in serious injury or death. The cabinet power switch DOES NOT disconnect all incoming power to the cabinet.

Fig. 1: The sides are held in place by screws near the base of the unit on each side.

Fig. 2: Tabs in the topcap extend to holes in the cabinet. The top is secured with at the tabs with screws.

2.1 Updating Software/Capturing Configurations

The five sections of software on the cabinet can be updated individually. To ensure compatibility between cabinet software and replacement boards, the software should be updated to the latest version at any board replacement. Follow the directions below.

Keypad: Enter Power Switch: Cycle programming power between each

revision update.

Programming key:

OK: Press to confirm

Arrows: Scroll to

Press prior to entering

choices.

choices.

programming code.

 

 

Software updates use the master control display to enter programming codes, scroll to areas to be revised, respond to questions and exit. The control is annotated above. The arrow and OK buttons are illuminated when active.

Check Existing Versions

1.With the unit powered up, press the programming key.

2.Screen scrolls Enter Access Sequence.

3.Enter 090809 on keypad.

4.Press OK.

5.Scroll with arrow keys to view all software revision numbers:

Main

Boot Loader

Master Display

Distribution Board

Row Display

6.Press OK.

NOTE: If the master control displays an error message during the install process, turn the cabinet off for 30 seconds and back on. Repeat install steps.

2-1

Loading Sequence
Software should be loaded in this sequence:
• Main Board
• Language
• Row Display
• Distribution Boards
If the software update only involves a few of the components, following the loading sequence, skipping the unneeded component.
Incompatibility Message
The cabinet can display an incompatibility message during software upgrades. The buttons will remain active. Follow the loading sequence and the incompatibility is corrected as the software components are loaded.

Cabinet Service Procedures

Update: Boards

1. Turn power off.

2. Insert flash drive in USB port located on cabinet bezel. 3. Turn power on.

4. Cabinet displays version numbers followed by current menu setting.

5. Press programming key.

6. Screen scrolls Enter Access Sequence.

7. Enter 98765 with keypad.

8. Press OK.

9. Scroll with arrow key until software section (see loading sequence box) to be updated is displayed on master control board.

10. Press OK.

11. Screen displays Copying Files, Please Wait. This takes several minutes.

12. Screen messages will vary, depending on software section being installed. Follow screen instructions.

13. Screen displays Complete.

14. Press OK.

15. Screen displays Main Boot Loading and a percentage of completion.

16.After 100% is displayed, screen goes blank and returns to menu display.

17.Turn cabinet off for 30 seconds and back on.

Update: Language File

1.With the unit on, press program button.

2.Enter 090709 with the keypad.

3.Press OK.

4.Screen displays Reconfigure OK or Cancel.

5.Press OK.

6.Screen displays Please Wait Lang Bin.

7.Screen displays 9 files copied.

8.Press OK.

9.Screen returns to normal display.

10.Turn cabinet off for 30 seconds and back on.

Capture Cabinet Menus/Configurations

The menu items and cabinet configurations in a cabinet can be captured and used to configure cabinets with identical software setups. Follow the instructions below to capture the menus and configuration from a cabinet.

1.Insert an empty flash drive in the USB socket on the cabinet with menus and configurations to be copied.

2.Press the programming key.

3.Enter 759248 with the keypad. The configuration of a cabinet can be captured on an empty

4.

Press OK.

flash drive for transfer to cabinets with the same software

5.

The master control will display

setup.

Copy from UHC to

2-2

Cabinet Service Procedures

USB.

6.Press OK.

7.The master control displays Please Wait… as files are transferred to the flash drive, changing to the number of files copied when the process is complete.

8.Press OK.

9.Remove flash drive.

10.Cabinet returns to normal display.

Configure Cabinet with Menu/Configuration Captured on another Cabinet

1.Place a flash drive with only a captured menu/cabinet configuration in the root file into the USB port of a cabinet to be identically configured.

2.Press the programming key and enter 090709 with the keypad.

3.Press OK.

4.The master control will display

Reconfigure OK or Cancel.

A cabinet configuration can be transferred to multiple cabinets with a captured configuration held on a flash drive.

5.Press OK.

6.The master control will display Please wait… as the files are updated, changing to the number of files copied.

7.Press OK.

8.The cabinet will return to the original menu setting, changing row position displays to match items introduced with the configuration transfer.

Cabinet Access Codes

Code

Function

759248

Capture cabinet configuration to flash drive

 

 

98765

Load software updates from USB drive

 

 

1955

Enter manual programming mode (see operation manual).

 

 

4557

LON Works service pin

 

 

090809

View software versions

 

 

1111

Service test mode

 

 

090709

Update language file

 

 

2-3

Cabinet Service Procedures

2.2 Placing the cabinet in Service Mode

The cabinet can be put in service mode, a diagnostic settings which allows the heater plates to be controlled individually, brightness settings on the displays adjusted and re-addressing for unique arrangements of bezels. Follow the steps below :

Switching Heater Plates Off Individually

When troubleshooting, it may be useful to switch heater plates off individually. Follow the instructions below:

1.Press the programming key.

2.Enter 1111 at the Enter Access Sequence prompt.

3.The screen will scroll Row 1 Top Heater Off; pressing OK turns it back on.

4.Voltage can be measured between the plate-specific heater leads on the distribution board and the common block to the right of the distribution board as the heater plates are switched, individually, on and off.

5.Scroll to other plates with WX.

6.Ensure the plates are on before backing out of the Service Mode with the /.

Adjusting Display Brightness

When multiple row positions are timing the same item, the display with the least remaining time is the brightest. All others are dimmer as are positions not actively timing a product. The relative brightness of the bright display and the dim display can be adjusted. Follow the instructions below:

1.Press the programming key.

2.Enter 1111 at the Enter Access Sequence prompt.

3.Press OK.

4.The screen will scroll Row 1 Top Heater Off.

5.Scroll with X through all the Heater Plate prompts until the screen displays Press OK to Adjust Bright Row Display.

6.Press OK.

7.The cabinet’s row displays become

Decrease

Increase

88888 20

8.Press the timer button next to the Decrease display to lessen the brightness; the number displayed at the right will decrease. Press the timer button next to the Increase display to increase the brightness; 20 is the maximum.

9.Press OK. The display becomes Adjust Dim Intensity. The cabinet’s row displays become

Decrease

Increase

88888 03

10.Press the timer button next to the Decrease display to lessen the brightness; the number displayed at the right will decrease. Press the timer button next to the Increase display to increase the brightness; 1 is the minimum.

11.Press OK.

12.Cabinet returns to menu display.

2-4

Cabinet Service Procedures

Readdressing the Cabinet

Addressing, or assigning a position-specific component such as a display or distribution board, is done automatically by the cabinet on startup. Communication errors can occur on start-up after a board installation however. If so, follow the instructions below to readdress the cabinet. This process can also be used during troubleshooting when displays are connected out of synch with their associated bezel on the same row level.

1.Press the programming key.

2.Enter 1111 at the Enter Access Sequence prompt.

3.The screen will scroll Row 1 Top Heater Off.

4.Scroll with X through all the Heater Plate prompts until the screen displays Press OK to ReAddress.

5.Press OK.

6.Screen Displays Please Power Cycle Off.

7.Turn the cabinet off and back on.

8.The cabinet will start in the normal start-up sequence.

2-5

Cabinet Service Procedures

2.3 Accessing the Electronic Components

1.The component shelf is accessed by removing two screws on each side of the unit (Fig. 1).

2.Lift and remove the sides, which exposes screws that hold the top in place (Fig. 2).

3.The components are annotated below (Fig. 3).

LON board

Cooling fans

LON filter

Figure 3

 

 

Master

 

 

Display

 

 

Board

 

NOTE: The cooling fans

 

 

rest on ducts, and cool

Master Control

 

specific regions of the

Board

 

cabinet.

 

 

 

LON

 

 

filter

Power supply

All the components are readily removed. There are no replaceable components on the circuit boards.

2.4 Circuit Board LED Diagnostics

Master Control Board:

HB LED is a heartbeat; should be flashing when in the normal

inuse mode. Flash rate is not

Fig. 4: Master Control Board LED's

critical.

 

ACT LED similar to HB but flashes at a faster rate.

OK LED toggles each time a valid communication packet is sent and received. Normally a very fast flicker.

2-6

Cabinet Service Procedures

ERR LED toggles when a communication error is detected; it’s not unusual to see a flash, but regular flashing means communications problems.

LED5 and LED6 used for programming/debugging; have no diagnostic function.

LED7 When lit, the master control is executing a time or temp query operation on the front side.

LED8 When lit, the master control is executing a time or temp query operation on the back side.

Distribution Board

HB LED is a heartbeat LED; toggles on / off to indicate processor is running.

ACT LED flashes when it receives a valid communication packet; it should be flashing every few seconds or faster.

LED3 Toggles if there is a communications error on a packet directed to the distribution board. Can flash on occasion; shouldn’t flash regularly.

LED1 flashes if there is voltage being applied to one or more heaters on that distribution board; one or more plate is calling for heat.

Fig. 5: Distribution Board LED's

2.5 Tests

2.5.1 Power Supply

1.Disconnect power and check all terminals and connections for loose or disconnected wires.

2.Apply power and check for 5VDC at the power-in terminal on the distribution board and chassis ground.

2.5.2 RTD

1.Remove the leads from the suspect RTD and test for resistance. Selected temperatures and resistances are show in chart at right.

NOTE: After testing, reconnect all leads to their original positions.

2.5.3 Distribution Boards

1.Check for line voltage between the heater plate terminal on the board and the terminal block for the

Sensor

Resistance

Sensor

(°F)

(°C)

 

60

106.065

15.55

70

108.224

21.11

80

110.380

26.66

90

112.532

32.22

100

114.680

37.77

110

116.825

43.33

120

118.966

48.88

130

121.104

54.44

140

123.239

60.00

150

125.369

65.55

160

127.496

71.11

170

129.620

76.66

180

131.740

82.22

190

133.856

87.77

200

135.969

93.33

210

138.078

98.88

220

140.184

104.44

230

142.286

110.00

240

144.385

115.55

250

146.480

121.11

260

148.570

126.66

RTD resistance chart

2-7

Cabinet Service Procedures

suspect heater. Note: Line voltage is only seen when the row is calling for heat.

2.Check for line voltage between the power input terminal and the terminal block.

3.Check for +5VDC at the power-in terminal and the terminal block for the power supply.

NOTE: After testing, reconnect all connections to their original positions.

2.5.4 Display

1.Remove power from unit.

2.Connect the ribbon cable from a suspect display to the connector of a properly working display to isolate the problem to the display or the distribution board.

3.Reapply power to cabinet.

2.5.5 Shorted Triac

Fig. 6: Distribution board shown with display cables removed.

1.Turn the suspect row off and measure

voltage between the suspect heater lead on the distribution board and the terminal block. With the row off, there should be no line voltage. If the triac is shorted, you will measure AC line voltage. If the triac is half waving, you will get DC voltage of approximately one-half the line AC voltage.

2.5.6 Heater Plate

1.Disconnect power to the cabinet. Remove side and top panels. Disconnect the black heater lead and the RTD leads (brown and red) of the suspect plate from distribution board. Measure resistance of the heater from the black lead to any terminal on the white terminal block. Resistance should be 140-150 ohms.

2.Measure resistance across the brown and red RTD leads. Resistance must be within a range of 104-148 ohms. Resistance at room temperature is approximately 107 ohms. See chart on Page 2-4 for resistance at different temperatures. If either resistance is incorrect, replace the heater plate.

2.5.7 Display Meanings

1.ROW TEMP HIGH OR ROW TEMP LOW and no audible alarm. This is normal when the row is changing temperature in association with a menu change.

2.LLLL means the RTD indicates a temperature below 50°F (10°C). Unit will automatically heat at 20 percent until temperature is above 50°F (10°C), then operate normally.

2-8

Cabinet Service Procedures

3.HHHH means RTD indicates the temperature is above 255°F (124°C), but below "Open" circuit resistance, which causes SENS ALARM.

4.UHC VERSION _ _ _ (version number will vary)

appears for five seconds when the unit is turned on.

5. The cabinet also displays a variety of error messages, which are shown on page 3-1.

2.6 Removing/Replacing Bezels

1.Remove power from unit.

2.Remove screws at the base of each side and remove side panels. (See figure 7.)

3.Unplug the bezel from the distribution board.

4.Plug the replacement bezel into the distribution board, return power to the unit and test the bezel/cabinet for accurate operation.

Fig. 7: Two screws (see arrows) at the base of each side of the cabinet secure the sides.

5.Remove replacement bezel and remove power from the unit.

6.Loosen the hex nut which secures the row and remove the allen screw, which holds the bezel. Also remove, if present, the small bezel-securing screw. (See photo below.)

7.Push, if necessary, on the mounted bezel through the access port in the inner panel to loosen the bezel. (See Figure 8 below.)

8.Remove bezel; clean and degrease the groove in the heater plate.

9.Route ribbon cable for the new bezel through the inner panel of the cabinet and press the new bezel into place. Ensure it is firmly seated and tighten hex nuts and replace allen screws.

10.Return sides and reposition cabinet for operation.

Fig. 8: Loosen the hex bolt and remove the allen screw (arrows, upper photo). Some row positions may have an additional screw securing the bezel to the cabinet (lower photo). Push through the access port (arrow, upper photo), if necessary, to remove the bezel from the cabinet .

2-9

Fig. 10, 11: Find the set screws under the foil insulation and push through with an allen wrench.

Cabinet Service Procedures

2.6. 1 Removing/Replacing a Distribution Board or Communication Board

1.Remove power.

2.Remove and mark the wires on the faulty component.

3.Remove the board by lifting it from its standoffs.

4.Position the new board and attach wires.

5.Reapply power.

6.Run readdress steps on page 2-4.

2.6.2 Removing a Row

1.Remove the sides and top as shown in earlier steps. Disconnect the faulty row from the distribution board, and terminal block.

2.Remove the bezels on each end of the affected row, as shown in earlier steps, and the necessary adjacent bezels to

remove the row.

Fig. 9: A row is shown partially removed from the cabinet.

3.Remove wire wraps from wiring harness holding heater and control wires for affected row.

4.Lifting slightly, carefully slide the malfunctioning row out of the cabinet. Do not allow the row to contact or damage the controls of the unit below (Fig. 9).

2.6.3 Replace Heater Plate/RTD

1.Remove row as shown above.

2.Run your fingers around the outside surface of the row assembly. There are four raised areas. These are the setscrews, which hold the heater plate to the spacer. Punch holes in the insulation, directly above the location of the setscrews. (Fig. 10, 11).

3.Use an allen wrench to loosen the four spacer-setscrews along the edges of the plate.

4.Slide the malfunctioning plate out of the spacer.

5.Slide the replacement plate into position. Make sure the plate is inserted squarely. Tighten set screws.

6.Route the wires to one end of the row and wire tie the power wires together. Also wire tie the RTD wires together. Stand the row on the opposite end adjacent to the cabinet and feed the wires into the cabinet.

7.Carefully slide the row far enough into the cabinet to be stable.

8. On the opposite side, reach into the cavity and direct the wires through the appropriate grommets

to reach the power and RTD connections on the distribution board.

2-10

Cabinet Service Procedures

9.Slide the row assembly completely into the cabinet and return the spacers between the heater plates. Ensure the row is evenly positioned in the cabinet. There must be sufficient space to allow the bezel tabs to fit between the outside row plate and the cabinet interior wall.

10.Replace the bezels.

Fig. 12: The heater plate slides from the insulation.

CAUTION

Ensure the heater plate setscrews are tightened securely to the spacer. Tightening the setscrews will ensure the plate is properly grounded.

2-11

Cabinet Troubleshooting

The master control display and the row displays show error messages when there is a problem. The messages are shown in the matrix below along with possible causes and diagnostic tests.

Error Message

 

Cause

 

Tests

 

 

 

The master control board has lost

 

• Turn the cabinet off and back on.

 

Call service row display

communication with the specified

 

• Ensure there are no software

 

error

board.

 

incompatibilities.

 

Row number also displayed *

 

 

• Inspect ribbon cable connections.

 

 

 

 

 

 

 

 

 

The master control board has lost

 

• A display connection can produce

 

Call service distribution

communication with the top

 

this display. Before replacing a

 

board 0 error*

distribution board.

 

distribution board, remove power

 

 

 

 

 

from the unit and disconnect the

 

 

 

 

 

displays from the affected

 

 

 

The master control board has lost

 

distribution board. Return power

 

 

 

communication with the bottom

 

to the unit and, one at a time, plug

 

Call service distribution

distribution board.

 

in the displays, cycling power each

 

board 1 error*

 

 

time. If the problem is display

 

 

 

 

 

related it will go away with the

 

 

 

 

 

affected display disconnected.

 

 

 

 

 

 

 

 

 

 

 

• Turn the cabinet off and on, which

 

 

 

 

 

can clear the problem if it is

 

 

 

 

 

software related.

 

Call service rate of

Row’s top plate failed to reach

 

• Check top plate RTD output against

 

required temperature in prescribed

 

chart on page 2 4.

 

rise top**

 

 

time window after startup or when

 

• Enter service code (see page 2 1)

 

 

 

 

 

 

 

switching between menus.

 

and switch top plate on and off to

 

 

 

 

 

ensure it is responding to cabinet

 

 

 

 

 

circuits.

 

 

 

 

 

 

 

 

 

 

 

• Turn the cabinet off and on, which

 

 

 

 

 

can clear the problem if it is

 

 

 

 

 

software related.

 

 

 

Row’s bottom plate failed to reach

 

• Check bottom plate RTD output

 

Call service rate of

required temperature in prescribed

 

against chart on page 2 4.

 

rise bot **

time window after startup or when

 

• Enter service code (see page 2 1)

 

 

 

switching between menus.

 

and switch bottom plate on and off

 

 

 

 

 

to ensure it is responding to

 

 

 

 

 

cabinet circuits.

 

 

 

 

 

 

Call service top row temp

 

 

• Compare plate temperature to

 

too high **

 

 

displayed temperature.

 

Call service bot row temp

 

 

• Compare plate RTD resistance to

 

 

 

chart on page 2 4.

 

too high**

 

 

 

 

 

• Switch plate on/off with service

 

Call service top row temp

 

 

 

 

 

code to ensure it is responding to

 

too cool**

 

 

 

 

 

cabinet circuits.

 

Call service bot row temp

RTD sensor is producing a reading

 

 

 

With plate on and calling for heat,

 

too cool **

that is out of range. The problem can

 

 

 

check amp draw on leads between

 

Call service top sensor

be a failed RTD, heater or

 

 

 

distribution board and heater

 

error hi temp**

distribution board.

 

 

 

plate. Amp draw on a properly

 

Call service bot sensor

 

 

 

 

 

functioning plate should be 1.67.

 

error hi temp**

 

 

 

 

 

 

 

Call service top sensor

 

 

 

 

error low temp **

 

 

 

 

Call service bot sensor

 

 

 

 

error low temp**

 

 

 

 

* Shown on master control display. ** Shown on affected row display.

 

 

 

3-1

Cabinet Troubleshooting

Failure modes not accompanied by a master control display are shown below with possible causes and tests.

 

Symptom

 

 

 

Possible Causes

 

 

Tests

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No power to cord.

 

Check for line voltage at the switch

 

Unit fails to power

 

Blown 20 amp fuse.

 

and the transformer.

 

up; fans don’t run.

 

Circuit breaker open.

 

Reset circuit breaker.

 

 

 

 

 

 

 

 

Unit powers up and

 

Broken or improperly

 

Switch ribbon cable from functioning

 

fans run; a display

 

 

seated ribbon cable.

 

display to failed component to isolate

 

fails to light.

 

Defective display.

 

problem.

 

 

 

 

 

 

 

 

 

 

Unit powers up and

 

 

 

 

Check for 5VDC at communication

 

fans run; all

 

Failed power supply.

 

 

 

 

board and distribution boards.

 

displays fail to light.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ensure heater leads and power inputs

 

 

 

 

 

 

 

 

on the distribution boards are properly

 

 

 

 

 

 

 

 

seated.

 

 

 

 

 

 

 

 

Test for 208VAC input on distribution

 

 

 

 

Improper wiring on

 

board and 208VAC output from heater

 

 

 

 

 

leads to heater plate when the unit is

 

Rows heat

 

 

distribution board.

 

calling for heat.

 

 

Defective distribution

 

Switch power leads from properly

 

improperly or not at

 

 

 

all.

 

 

board.

 

operating row to faulty row to isolate

 

 

Defective heater.

 

problem.

 

 

 

 

 

 

 

 

 

Defective sensor.

 

Check resistance of RTD lead against

 

 

 

 

 

 

 

 

temperature chart. See Page 2-4.

 

 

 

 

 

 

 

 

Switch RTD lead from properly

 

 

 

 

 

 

 

 

operating row to faulty row to isolate

 

 

 

 

 

 

 

 

problem.

 

 

 

 

 

 

 

 

Test continuity of heater plate.

 

 

 

 

 

 

 

 

 

 

3-2

Cabinet Parts

Parts Lists, Exploded Views

 

1

 

3

 

 

 

 

 

 

2

 

 

 

4

 

6

7

8

 

 

 

5

 

 

 

 

 

9

 

 

 

11

 

10

 

 

 

 

 

12

 

 

 

13

 

 

 

14

Item

Part Number

 

Description

1

108-1897

 

Top Cap

2

823-7636

 

Rear Fascia

3

807-4882

 

Circuit Breaker, 16 amp

4

807-5111

 

Time/Temperature switch

5

807-4911

 

Power switch

6

823-7513

 

Front fascia

7

807-5112

 

Master control overlay with ribbon cable

*

807-5156

 

Master display board (circuit board in master display assembly)

 

 

 

4-1

 

 

Cabinet Parts

 

 

 

Item

Part Number

Description

 

 

 

8

807-5111

Time/Temperature switch

9

826-2781

Bezel, with boards, front with short ribbon cable

*

826-2782

Bezel with boards, rear, with long ribbon cable

10

108-1190

Base

11

807-4857

Heater plate/RTD

12

807-4860

Distribution board

13

108-1633

Side, left, vented

14

108-1632

Side right, not vented

Component Shelf

 

 

 

15

 

 

20

16

 

19

17

 

 

 

 

18

Item

Part Number

Description

15

807-5150

Master control board

16

807-2665

Blower

17

807-4951

LON board, domestic

*

807-4952

LON board, international

 

 

4-2

Item

Part Number

18807-4868

19807-3490

20406-0011

*

*807-4916

*807-4917

*807-4875

*807-4922

*807-4923

*Not Illustrated

Cabinet Parts

Description

Power Supply Power relay

UHC-HD Single Filter Board

Ribbon Cables

Time/Temp 18” used for front fascia Time/Temp 32” used for rear fascia Master distribution

Power to upper distribution board Power to lower distribution board

4-3

Cabinet Wiring Diagrams

Wiring Diagram, Delta Power, L1-L2

5-1

Cabinet Wiring Diagrams

UHC-HD, WYE Power, L1-N

5-2

Frymaster, L.L.C., 8700 Line Avenue, Shreveport, Louisiana 71106

TEL 1-318-865-1711 FAX (Parts) 1-318-219-7140 FAX (Tech Support) 1-318-219-7135

 

SERVICE HOTLINE

Price: $6.00

PRINTED IN THE UNITED STATES

1-800-551-8633

819-6606

 

 

OCT 2010