Daikin REMQ16PY1 [288/491] Caution be su re to t u rn off power s witch b efore connect or di s connect connector or p a rt s d a m a ge m a y b e occ u rred

Daikin REMQ16PY1 [288/491] Caution be su re to t u rn off power s witch b efore connect or di s connect connector or p a rt s d a m a ge m a y b e occ u rred
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NO
NO
NO
YES
YES
Shut the power supply off after
connection and then restart.
Replace coil of electronic
expansion valve.
Replace relay cables.
When restarting the operation after
shutting the power supply off does
not work, replace indoor unit PC
board.
NO
Replace electronic expansion valve
main body.
YES
YES
Electronic
expansion valve is
connected to X7A of indoor
unit PC bo
ard.
Coil check
(1) of electronic
expansion valve drive
indicates normal.
Relay cables
short circuit or
disconnected.
When power is supplied.
1: How to check the coil of electronic expansion valve drive
Remove the connector for electronic expansion valve (X7A) from PC board. Measure the resistance
value between pins and check the continuity to judge the condition.
φ1
φ3
Yellow
(2)
Brown
(6)
Blue
(4)
φ2 φ4
M
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
1) White
2) Yellow
3) Orange
4) Blue
5) Red
6) Brown
The normal products will show the following conditions:
1 No continuity between (1) and (2)
2 Resistance value between (1) and (3) is approx. 300 Ω
3 Resistance value between (1) and (5) is approx. 150 Ω
4 Resistance value between (2) and (4) is approx. 300 Ω
5 Resistance value between (2) and (6) is a
pprox. 150 Ω
White (1)
Red (5)
Orange (3)

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