Expansion Valve Control - Fujitsu AUXB04GALH Service Manual

2-5 EXPANSION VALVE CONTROL

The EEV controls the flow of refrigerant
Operation mode
Cooling
EEV 1
EEV 2
Heating
Cooling
EEV 3
Heating
Initialization conditions:
- When power turned On. - When operation stopped.
4WV 1
4WV 2
Contrl and detection
- SH control (TH7,TH8 - LPS )
"Target SH: 4
"
- Protection (TH1) (LPS)
- SH control (TH6, - LPS )
"Target SH: 4
"
- Protection (TH1)
TH9
TH7
HEX1
EEV1
TH8
TH10
EEV2
HEX2
FAN1
TH2
Control range
operation range
480 pulses
11 - 480 pulses
0- 500 pulses
EEV3
TH4
SCHEX
TH6
02-10
stop
0 pulse
0 pulse
0 pulse
TH5
4WV 3