Hoshizaki FTC-120MDA, Service Manual

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27
Defrosting stops automatically when the evaporator temperature reaches the defrost
termination temperature or when the defrost time runs out, or can be stopped manually.
If the evaporator sensor is not activated or in error, defrosting stops when the defrost time
runs out, or can be stopped manually.
Sensor Error Alarm
Alarm Code Possible Cause Operation
E1 Cabinet sensor (interior
thermistor) error
Compressor shuts down. When troubleshooting is
over, system recalculates compressor delay time.
E2 Evaporator sensor (defrost
thermistor) error
Defrost termination temperature is invalid.
Wiring Diagram
6
The system will begin defrosting according to the setting defrosing cycle , or
manually start defrosting. If evaporator sensor was activated, and the evaporator
sensor temperature is higher than the defrosting termination temperature, manually
start defrosting is not available.
Defrosting will stop when the evaporator temperature reaches the defrosting
termination temperature, or when the defrosting time run over, or manually stop the
defrosting.
If the evaporator sensor was not activated or when it is error, defrosting will be
stopped when the defrosting time run over, or it can be manually stopped.
Eighth
ǃ
Alarm of sensor error:
When the cabinet sensor errors happen, the controller will flashing indicate the
alarm code E1, with the buzzer doing nothing; close the compressor, when the
troubleshooting is over, system will recalculate the compressor delay time.
When the door-trip alarms, the controller will flashing indicate the alarm code
E2, with the buzzer ringing after running the time of "F5".
Alarm
code
Reason Output mode
E1
Cabinet sensor
error
Close the compressor, when the
troubleshooting is over, system will
recalculate the compressor delay time.
E2 Evaporator error
The defrosting termination temperature is
invalid.
Ninth
ǃ
Wiring diagram:
Tenth
ǃ
Safety Rules:
Dangerous
ƾ ˖
1
ǃ
Strictly distinguish the sensor down-lead, power wire and output interface of the
relay, and prohibit wrong connections or overloading the relay.
Defrost
Interior