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When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn't operate.
How to check mis-wiring and serial signal error
F
Outdoor unit doesn't operate.
Repair wiring.
Is there 20V DC between both ends of R132 when
contactor(52C) turns ON?
( By tester, the stylus is between 0 ~ 20V. )
Yes
1. Turn OFF the power supply.
2. Re-connect in-out connecting wires.
3. Turn ON the power supply.
3 minutes later, when the EMERGENCY OPERATION switch
is pressed and contactor(52C) turns ON, is there 220-240V AC
between the outdoor terminal block
Yes
Is there 5V DC between J205
P.C. board?
2 (Refer to page 50.)
Yes
Is there 10V DC between both ends of R601 on
the deicer P.C. board?
2 (Refer to page 50.)
(By tester, the stylus is between 5 ~10V)
Yes
Replace the outdoor deicer P.C. board.
1. Turn OFF the power supply.
2. Turn ON the power supply.
3. Press the EMERGENCY OPERATION switch.
3 min. later, when contactor(52C) turns ON, what self-check result is
displayed on OPERATION INDICATOR lamp on the indoor unit?
Yes
Is there mis-wiring, poor contact, or wire disconnection?
1. Turn OFF the power supply and disconnect in-out connecting wires on the indoor side.
2. Short-circuit between indoor terminal block
3. Turn ON the power supply and press the EMERGENCY OPERATION switch.
No
-
?
2
N
2
No
+
- J101
, on the deicer
–
No
Start
Mis-wiring is indicated.(0.5-sec.ON, 0.5-sec.OFF)
No
and
.
N
3
No
2 While the serial signal error is indicated, contactor(52C) alternates ON
for about 10 seconds and OFF for 3 minutes.
Measure the voltage when contactor(52C) is ON.
47
1 Short circuit of JPG and JPS on the
indoor electronic control P.C. board
enables self-check to be displayed in 3
seconds.
Serial signal error is indicated.
(1-sec.ON, 2.5-sec.OFF)
1
Replace the indoor electronic control
P.C. board.
Rectify the indoor/outdoor connecting wire.
Check and rectify the fuse and the varistor
on the outdoor deicer P.C. board.
Rectify the indoor/outdoor connecting wire.
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