Mitsubishi TDJ300D, Руководство по обслуживанию

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1. When defrost switch has been turned on or defrost timer is operating (the timer is built into the controller and is set
in 3 hours for shipment from factory)
•
Defrost indication lamp lights. (orange)
•
AR
3
(evaporator fan motor relay) is dropped out, and FM
1
(evaporator fan motor) is disconnected and then
evaporator fan motor stops.
•
AR
4
(condenser fan motor relay) is dropped out, FM
2
(condenser fan motor) is disconnected and then condenser
fan stops.
•
AR
5
(defrost electromagnetic relay) is energized, and SV
1
(defrost electromagnetic valve) is electrified and open.
Defrost operation will start after going through the above procedure.
Remarks: Even if the unit is stopped by thermostat operation, defrost timer will operate or if defrost switch is turned
on, it performers defrost operation.
2. When frost is melted and evaporator coil temperature rises, DTS (defrost thermostat, "ON": 0°C "OFF": 8°C) turns off.
•
Defrost indication lamp (orange) turns off.
•
AR
3
(evaporator fan motor relay) is energized, and FM
1
(evaporator fan motor) is electrified and evaporator fan turns.
•
AR
4
(condenser fan motor relay) is energized, and FM
2
(condenser fan motor) is electrified and condenser fan turns.
•
AR
5
(defrost electromagnetic relay) is dropped out, SV
1
(defrost electromagnetic valve) is disconnected and closed.
•
AR
7
(drain hose heater relay) is dropped out and H (drain hose heater) is disconnected. (It will be electrified
when storage temperature drops and DTS becomes "ON".)
•
Defrost timer becomes "OFF". (When storage temperature drops and DTS becomes "ON", it starts adding up time.)
Cooling operation will start after going through the above procedures.
– 30 –
C Defrost operation