Fujitsu GENERAL AOHG18KMTA, Service Manual

Page: 132 / 158

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.
200
ms
1,500
ms
200
ms
2,000±100
ms
Compressor
4-way valve
power supply
4-way valve
polarity
4-way valve
switching
Heating mode
Cooling mode
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
Current
Trigger condition Release condition
Cooling/Dry mode
5.0 A 4.5 A
Heating mode
7-12. 4-way valve control
- (04-26) -
7. Various control
C
O
N
TR
O
L
A
N
D
FU
N
C
TI
O
N
S
C
O
N
TR
O
L
A
N
D
FU
N
C
TI
O
N
S