4-Way Valve Check; 4-Way Valve Function - Haier MRV5-H Service Manual

8.2.3 4-Way Valve Check

1. After the valve is energized, listen to the sound of valve action, if no action enter the next checking.
For the solenoid valve: check if the PCB terminal has 220V output, if yes, change the solenoid valve coil, if not OK,
change the solenoid valve body.
For the electronic expansion valve: measure the resistance value.
5 4 3 2 1
red blue orange yellow white
FUJIKOKI electronic expansion valve
Resistance value:
1 and 5: 46±4Ω
3 and 5: 46±4Ω
1 and 3: 92±8Ω
2 and 4: 92±8Ω

8.2.4 4-Way Valve Function

After 4-Way valve powered on 3 minutes, if it satisfy one of the following condition lasting 10 seconds.
Condition:
O
--Tsuc-Tdef≥50 F
O O
--Pd-Ps≥βMP (Tao>14 F, β=0.60; Tao≤14 F, β=0.4)
142