Daikin FXYBP20K7V1, Service Manual

Page: 143 / 193

Troubleshooting SiE 00-07
132 Troubleshooting R-407C PLUS Series
3.6 Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E)
Remote Controller
Display
A9
Supposed Causes Malfunction of moving part of electronic expansion valve
Defect of indoor unit PC board
Defect of connecting cable
Troubleshooting
∗
1: Coil check method for the moving part of the electronic expansion valve
Discount the electronic expansion valve from the PC board and check the continuity between the
connector pins.
(Normal)
: Continuity
×
: No continuity
(VF033)
After connecting, turn the power supply
off and then back on.
Replace the moving part of the
electronic expansion valve.
YES
YES
NO
NO
Replace the connecting cable.
If you turn the power supply off and
turn on again, and it still does not help,
replace the indoor unit PC board.
NO
YES
The electronic
expansion valve is connected
to X7A of the indoor unit
PC board.
Normal
when coil check (
∗
1) of
the moving part of the electronic
expansion valve
is checked.
The connecting
cable is short-circuited or
disconnected.
Pin No. 1. White 2. Yellow 3. Orange 4. Blue 5. Red 6. Brown
1. White
×
Approx. 300
Ω
×
Approx. 150
Ω
×
2. Yellow
×
Approx. 300
Ω
×
Approx. 150
Ω
3. Orange
×
Approx. 150
Ω
×
4. Blue
×
Approx. 150
Ω
5. Red
×
6. Brown