26
Outdoor unit LED
Green
Keeps flashing
Stays OFF
Stays OFF
Stays OFF
Stays OFF
1 time flash
1 time flash
1 time flash
1 time flash
1 time flash
2 time flashes
3 time flashes
4 time flashes
5 time flashes
1 time flash
2 time flashes
3 time flashes
4 time flashes
5 time flashes
Red
Stays OFF
Failure at:
Contents of the failure
Installation or
operation status
Installation or
operation status
Installation or
operation status
Installation or
operation status
Discharge gas
thermistor
Outdoor heat
exchanger thermistor
Outdoor temperature
thermistor
Discharge gas
thermistor
Failure to open the
service valve
Outdoor heat
exchanger thermistor
CM wiring
Power wiring
• Over current of the compressor motor.
• Open phase at L2 phase (secondary wiring of 52C) of compressor.
• Defective outdoor unit PCB.
Stays OFF
1 time flash
• The outdoor power wiring is in reversed phase.
• Open phase at L3 phase (primary side).
• Incorrect set-up of outdoor unit PCB.
Normal/Power is supplied.
• The outdoor heat exchanger temperature is too high [70
°
C or over].
• Failure with the outdoor heat exchanger thermistor.
• The discharge gas temperature is too high.
• Failure with the discharge gas thermistor.
• The high pressure is too high or it went up (63H
1
, 49C).
• Closing of the service valve on the liquid/gas side.
• Failure or open circuit with the outdoor heat exchanger thermistor or
imperfect connection of the connector.
• Failure or open circuit with the outdoor temperature thermistor or
imperfect connection of the connector.
• Failure with the discharge gas thermistor or imperfect connection of the
connector.
• The wiring (secondary wiring of 52C) to the compressor is open.
(4)
Outdoor unit side (FDC(P)208~508 type, FDC808, 1008 type)
Failure mode on the outdoor unit is indicated by flashing both Green LED (LED-G) and Red LED (LED-R) on the printed circuit board.
Check Indicator Table
Parts No.
PCA505A046ZN
Model
1 phase model
Parts No.
PCA505A046ZS
Parts No.
PCA505A046ZC
Model
3 phase model
Model
FDC808, 1008 model
“Check Indicator” is resetted when power supply is turned off once and the failure is fixed.
(a)
Procedure for diagnosing trouble for outdoor unit
When diagnosing trouble for the outdoor unit, check the flashing and turns of the inspection indicator lamp (red LED) and
fault indicator lamp (green LED) to obtain a general concept of the nature of the problem. Then inspect and perform repair.
1)
Unit replacement parts related to printed circuit board for outdoor unit.
Micro-computer for outdoor unit, microcomputer, printed circuit board, thermistor (heat exchanger, discharge piping
and outdoor air), fuses and transformer.
2)
Summary of replacement for micro-computer for outdoor unit
a) Check the following part number
b) Set the overcurrent value using the overcurrent setting switch (SW3) for CM. Refer to the following table at the setting.
• Table of switch (SW3) setting
Model
Setting value (A)
15
Table of switch
setting
Make ON/OFF
setting for each
switch No.
( : ON, : OFF)
6
5
4
3
2
1
15
6
5
4
3
2
1
ON
FDC808HES3
24
6
5
4
3
2
1
ON
12
6
5
4
3
2
1
FDC1008HES3
34
6
5
4
3
2
1
ON
FDC208HEN3A
FDCP208HEN3A
FDC308HEN3
FDCP308HEN3
FDC308HES3
FDCP308HES3
FDC408HES3
FDCP408HES3
FDC508HES3
FDCP508HES3
FDC258HEN3A
FDCP258HEN3A
12
6
5
4
3
2
1
ON
9
6
5
4
3
2
1
ON
23
6
5
4
3
2
1
ON
ON
ON
