11.3 Explanation of operation (Explanation is made for TDJ300D-2L2)
(1) In case of engine drive
1. Start the engine of a vehicle to be run.
2. Turn the operation switch to "ON".
• Operation indication lamp will light. (green)
• AR
3
(Evaporator fan motor relay) is energized, and FM
1
(evaporator fan motor) is electrified and then the
evaporator fan turns.
3. When storage temperature is more than the established temperature (the thermostat is "ON").
• AR
1
(thermostat relay) is energized, and MCL
1
(magnet clutch on engine side) is electrified and then the
condenser fan turns.
• AR
4
(Condenser fan motor relay) is energized, and FM
2
(condenser fan motor) is electrified and then the
condenser fan turns.
4. When storage temperature is less than 0°C, DTS (defrost thermostat) is "ON".
• The defrost timer starts adding up time.
• AR
7
(drain hose heater relay) is energized and H (drain hose heater) (option) is electrified.
The above procedures make a cooling operation.
Remarks: If the delivery temperature becomes more than 125°C, AR
2
(Liquid injection relay) is energized and
SV
2
(Liquid injection electromagnetic valve) is electrified.
[Less than 120°C ······ non-energized]
– 28 –
A Cooling operation
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