Fresh Air Control; Compressor Preheating; Electronic Expansion Valve Control; Prevention To Restart For 3 Minutes (3 Minutes St) - Fujitsu General ASHG07KPCE Service Manual

7-6. Fresh air control

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as below.

7-7. Compressor preheating

By preheating the compressor, warm airflow is quickly discharged when the operation is started.
• Triggering condition
– 30 minutes after compressor stopped.
– Outdoor unit heat exchanger temperature (Tn)
When the jumper wire (JM2) is disconnected:

7-8. Electronic expansion valve control

The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the table below.
Operation mode
Cooling/dry mode
Heating mode
NOTE: At the time of supplying the power to the outdoor unit, the initialization of the electronic ex-
pansion valve is operated (528 pulses are input to the closing direction).

7-9. Prevention to restart for 3 minutes (3 minutes st)

When the compressor fails to start for the number of times below, it does not enter operation status
for 3 minutes.
Retry number
Retry set number
When the compressor fails to start in the retry set number above, the compressor is stopped.
7-6. Fresh air control
Operation
Fan motor
(Indoor unit)
Stop
Operation
Fan motor
(for Fresh Air)
Stop
Tn
-4°C
Tn
5°C
Tn
Off
-2°C
On
Tn
Off
7°C
On
Between 52 and 480 pulses
- (04-25) -
Pulse range
10
10
7. Various control