Indoor Unit: Malfunction Of Moving Part Of; Electronic Expansion Valve (Y1E) - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
3.6 Indoor Unit:
A9
Remote Controller
Display
„ Malfunction of moving part of electronic expansion valve
Supposed Causes
„ 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)
1. White
2. Yellow
3. Orange
4. Blue
5. Red
6. Brown
{ : Continuity
×: No continuity
Troubleshooting UM Combination "MA1R Series" Using R-407C
Malfunction of Moving Part of Electronic Expansion Valve (Y1E)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
The electronic
expansion valve is connected
to X7A of the indoor unit
PC board.
YES
Normal
when coil check (∗1) of
the moving part of the electronic
expansion valve
is checked.
YES
The connecting
cable is short-circuited or
disconnected.
NO
Pin No. 1. White
NO
NO
YES
2. Yellow 3. Orange
{
×
Approx. 300Ω
×
Troubleshooting
After connecting, turn the power supply
off and then back on.
Replace the moving part of the
electronic expansion valve.
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.
4. Blue 5. Red
{
×
Approx. 150Ω
{
×
Approx. 300Ω
{
×
Approx. 150Ω
×
(VF033)
6. Brown
×
{
Approx. 150Ω
×
{
Approx. 150Ω
×
503