4-Way Valve Control; Outdoor Unit Low Noise Operation - Fujitsu GENERAL ASHG18KMTE Service Manual

7-12. 4-way valve control

• If heating mode is selected at the compressor start, 4-way valve is energized for heating.
• →hen the air conditioner is switched between cooling and heating mode, compressor is stopped,
and the 4-way valve is switched when the 3 minutes passes and the compressor is started.
4-way valve
4-way valve
4-way valve
power supply
Compressor

7-13. Outdoor unit low noise operation

The outdoor unit low noise operation functions by OUTDOOR UNIT LO→ NOISE button on the re-
mote controller.
This operation stops the PFC control, and changes the current value.
Operation mode
Cooling/Dry mode
Heating mode
7-12. 4-way valve control
switching
polarity
200
ms
Heating mode
Cooling mode
1,500 200
ms ms
Trigger condition
5.0 A
- (04-26) -
2,000±100
ms
Current
Release condition
4.5 A
7. Various control