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CONTROL
2. Control Details
1) Temperature Control Start / Stop
1. Condition to start temperature control operation of the outdoor unit
Temperature control starts when both of the following conditions are met.
2. Condition to start temperature control operation
Temperature control starts when at least one of the connected indoor units requests temperature control.
3. Condition to prohibit starting when the outdoor unit is stopped.
The outdoor unit is prohibited from starting when any of the following conditions is met.
4. Condition to stop temperature control during outdoor unit operation
Temperature control of the outdoor unit stops when any of the following conditions is met.
5. Stopping method for the outdoor unit
Immediate stop control
The outdoor unit stops with this control when immediate stop is required among stops by error.
Normal stop control
The outdoor unit stops with this control when the remote controller stops the outdoor unit, or immediate stop
is not required among stops by error.
2) Starting the Outdoor Unit (Starting the Engine and Engaging the Compressor
Clutch)
1. Flow of starting control
Outdoor unit starting control is performed in the following order.
① Starting the engine
② Connecting the compressor
※ Warm-up starts when the system starts by turning the remote controller ON.
2. Starting the engine
Turn the starter ON to start the engine.
3. Connecting the compressor
The system engages compressor following the procedure below.
The system sets indicated engine speed to compressor engaging speed.
The system engages the compressor 2 when both of the following conditions are met (when the reversing
valve switching is activated).
Condition to start temperature control shown below is met. AND
The outdoor unit is not prohibited from starting.
When outdoor unit error or communication error is displayed. OR
Within 3 minutes after turning the power ON. OR
Within 3 minutes after engine stop. OR
Outside air temperature is lower than 14 ℉ (-10 ℃ ) in cooling operation.
No connected indoor units request temperature control. OR
Outdoor unit error or communication error occurs. OR
Outside air temperature is lower than 10 ℉ (-12 ℃ ) in cooling operation.
Actual engine speed is stable. AND
60 seconds have passed after completion of engine start.
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