Panasonic Urban Multi MX1R Series, Service Manual, Page: 182 / 643

PACD011001C2 Troubleshooting
Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 161
3.6 Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E)
Remote Controller
Display
A9 A9 A9 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.
Disconnect electronic expansion valve from P.C.B, then check the continuity between connector pins and
judge.
(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.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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