Traulsen SmartChill RBC50 Service Manual page 30

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XIII. TROUBLE SHOOTING ( Continued)
CONDITIONS
LOW SUCTION PRESSURE
HIGH HEAD PRESSURE
WILL NOT DEFROST
"PRINTER ERROR" ON
DISPLAY
DISPLAY BLANK
"ERR", "SHORT" OR
"OPEN"
PRINTER DOES NOT PRINT
TEST
PRINTER OUTPUT IS NOT
RECOGNIZABLE.
PRINTER DOES NOT
PRINT(OPERATOR MODE)
NO RESPONSE FROM
KEYPAD
PRODUCT NOT CHILLED
POSSIBLE SOLUTIONS
1. Solenoid valve restricted.
2. Restriction in drier.
3. Loss of refrigerant.
4. Poor air flow due to bad blower motor or iced up evaporator coil.
5. Expansion valve blocked.
1. Improper airflow across condenser.
2. Extreme ambient conditions.
3. Overcharge of refrigerant.
4. Air in system.
1. Defrost heater malfunction.
2. Wired wrong or faulty connection.
3. Relay contacts open.
4. Coil temperature sensor failure.
5. Controller malfunction.
6. I/O board malfunction.
7. Power/High voltage board.
8. Thermal fuse opened
1. Paper not feeding correctly.
2. Printer harness.
3. Printer mechanism/printer board error.
4. Printer power supply malfunction
5. Controller malfunction
1. Power supply to controller.
2. Controller (D21 on)
3. Main power supply. Should read 5v. –12v. & 8.5v
4. Display harness
5. Display board malfunction.
6. Controller malfunction
1. Probe open.
2. Temperature is normally displayed.
3. Wire connections.
4. Controller malfunction.
5. Out of range, actual temperature range (-40°F to 200°F).
1. Controller malfunction.
2. Printer malfunction.
3. Printer power supply board malfunction.
1. Controller malfunction.
1. Printer out of paper (message on display).
2. Printer malfunction.
3. Printer power supply malfunction.
1. Controller (LED D21on).
2. Check keypads.
3. Check connection to control board.
1. Product temperature probes not located
2. Correctly or sensor malfunction.
3. System malfunction. Refer to SYSTEM TROUBLESHOOTING.
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