(2) In case of motor drive
Remarks: As the operation of the thermostat and defrost is the same with that of engine drive, refer to page 29 and 30.
1. Turn on the power.
• GL
21
(AC power indication lamp) lights.
• AR
21
(AC-DC transfer relay) is energized.
(automatic switch-over from engine drive to motor derive.)
2. Turn on the operation switch.
• Operation indication lamp lights (green).
• AR
3
(evaporator fan motor relay) is energized, and FM
1
(evaporator fan motor) is electrified and evaporator fan
turns.
3. When storage temperature is more than an established temperature (thermostat is "ON"):
• If AR
1
(thermostat relay) is energized:
When AR
22
(actuator relay) is energized, MS (electromagnetic switch) is energized, which electrifies M (motor)
and the motor turns.
• AR
4
(condenser fan motor relay) is energized, and FM
2
(condenser fan motor) is electrified and condenser fan
turns.
4. When storage temperature is less than 0°C, DTS (defrost thermostat) is "ON".
• Defrost timer starts adding up time.
• AR
7
(drain hose heater relay) is energized and H (drain hose heater) (option) is electrified.
Cooling operation will start after going through the above procedures.
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]
– 32 –
A Cooling operation
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