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UHC-HD
Service, Parts Manual for 6, 3-Row Models
Frymaster, a member of the Commercial Food Equipment Service Association, recommends
using CFESA Certified Technicians.
Price: $6.00
24-Hour Service Hotline
*8196606*
819-6606
1-800-551-8633
OCT 10
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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 P
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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
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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 Timer keys 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
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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
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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. 2: Tabs in the topcap extend to holes in the cabinet. The top is secured with at the tabs with screws. Fig. 1: The sides are held in place by screws near the base of the unit on each side. 2.1 Updating Softwa
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Cabinet Service Procedures Update: Boards Loading Sequence Software should be loaded in this 1. Turn power off. sequence: 2. Insert flash drive in USB port located on cabinet bezel. • Main Board 3. Turn power on. 4. Cabinet displays version numbers followed by current menu • Language setting. • Row Display 5. Press programming key. • Distribution Boards 6. Screen scrolls Enter Access Sequence. If the software update only involves a few 7. Enter 98765 with keypad. of the comp
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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 identical
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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 p
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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. Pr
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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). Master Display Board Fans: a NOTE: rThe e spe cooling cific to fans LON board regions of the cabinet rest on ducts, and cool Master Control and ducted to direct specific re
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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 heartbea
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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 proper
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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.)
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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.
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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 th
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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
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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 and the transformer. • Blown 20 amp fuse. up; fans don’t run. • Reset circuit breaker. • Circuit breaker open. Unit powers up and • Broken or improperly • Switch ribbon cable from functioning fans run; a display seated ribbon cable. display
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Cabinet Parts Parts Lists, Exploded Views 3 1 2 4 7 6 8 5 9 11 10 12 13 14 Part Number Description Item 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
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Cabinet Parts Part Number Description Item 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 Part Number Description Item 15 807-5150 Maste
