Fujitsu ABHG18KRTA, Service Manual

Page: 302 / 471

5-3. Outdoor unit Electronic Expansion Valve (EEV)
¢
Models: AOHG30KBTA4 and AOHG36KBTA5
Check point 1. Check connections
Check connection of connector. (Loose connector or open cable)
NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA
AND PARTS LIST on page 02-117.
Check point 2. Check coil of EEV
Remove connector, check each winding resistance of coil.
Read wire Resistance value
White - Red
46 Ω ±4 Ω
at 20°C
Yellow - Red
Orange - Red
Blue - Red
→ If Resistance value is abnormal, replace EEV.
Check point 3. Check voltage from main PCB
Remove connector and check voltage (DC 12 V)
→ If it does not appear, replace main PCB.
Check point 4. Check noise at start up
Turn on the power and check the operation noise.
→ If an abnormal noise does not show, replace main PCB.
Check point 5. Check opening and closing operation of valve
When valve is closed, it has a temp. difference
between inlet and outlet
Pipe (In)
Pipe (Out)
Hi TEMP.
Normal TEMP.
CLOSE
Example : Hot Gas
If it is open, it has no temp. difference between
inlet and outlet
Pipe (In)
Hi TEMP.
OPEN
Example : Hot Gas
Pipe (Out)
Hi TEMP.
5-3. Outdoor unit Electronic Expansion Valve (EEV)
- (03-86) -
5. Service parts information
TROUBLESHOOTING TROUBLESHOOTING