Mitsubishi TDJ430D - Thermostat ON-OFF Operation During Cooling

1. In case a storage temperature drops (thermostat "OFF") to an established temperature
• AR
1
(thermostat relay) is dropped out, and MCL
1
(magnet clutch) is disconnected and then the compressor stops.
• AR
4
(condenser fan motor relay) is dropped out, and FM
2
(condenser fan motor) is disconnected and then the
condenser fan stops.
Remarks: The followings are operating even when the unit has stopped with thermostat "OFF".
(1) The evaporator fan is rotating.
(2) In case the storage temperature is less than 0°C (DTS is "ON".):
• Drain hose heater is electrified.
• Defrost timer adds up time.
(3) Operation indication lamp (green) is on.
2. In case the storage temperature has become more than the established temperature (thermostat "ON")
• AR
1
(thermostat relay) is energized, and MCL
1
(magnet clutch) is electrified and then compressor turns.
• AR
4
(condenser fan motor relay) is energized, FM
2
(condenser fan motor) is electrified and then condenser fan
turns.
Storage temperature will be kept at a fixed temperature by repeating the above procedure.
– 29 –
B Operation of ON-OFF by thermostat during cooling operation.
Remarks: The following shows a diagram
being stopped by thermostat.