Service Diagnosis - Ice-O-Matic Gourmet UCG Series Installation And Service Manual

SERVICE DIAGNOSIS

SYMPTOM
Unit will not run:
• No warning LED glows
• Green LED-Power ON glows
• Bin full LD glows
Red-alarm LED glows
•
• Red-alarm LED blinks
• Freezing LED + Red-alarm
LED glows and red-alarm
blinks twice and repeats
• Freezing LED + red-alarm
LED blinks
Compressor cycles
intermittently
POSSIBLE CAUSE
Blown power in fuse in PC
Board
Main switch in OFF position
Inoperative PC Board
Loose electrical connections
Blown power out fuse in PC
Board
Inoperative bin thermostat
Inoperative PC Board
High head pressure
High evaporating temperature
after 15 minutes beginning
freeze
Condenser sensor malfunction
Evaporator sensor malfunction
Low voltage
Non-condensable gas in system
Compressor starting device with
loose wires
Mechanical problem
UCG GOURMET SERIES UNDERCOUNTER
SUGGESTED CORRECTION
Replace fuse and check for
cause of blown fuse
Turn switch to ON position
Replace PC Board
Check wiring
Replace fuse and check for
cause of blown fuse
Clean or replace bin thermostat
Replace PC Board
Inoperative fan motor. Replace.
Hot gas valve leak; replace.
Water inlet valve leak; replace.
Short of refrigerant.
Compressor cycles
intermittently.
Replace.
Replace.
Check circuit for overloading.
Check voltage at the supply to
the building. If low, contact the
power company.
Purge the system, change drier,
pull vacuum, and recharge.
Check for loose wires in starting
device
Replace compressor.
pg. 27