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40MAHB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
DIAGNOSIS AND SOLUTION
Outdoor Unit Error Display
After the power is on, LED1 (blue color) flashes slowly (once per second) when the unit is in standby. The LED flashes quickly (twice per second) if
the unit has an issue.
Table 6 — Diagnostic Table Sizes 9K-18K
O (light) X (off)
(2.5 Hz flash)
Table 7 — Diagnostic Table Sizes 24K- 36K
NO.
PROBLEMS
LED3 (GREEN)
LED2 (RED)
IU DISPLAY
SOLUTION
1
IPM malfunction or IGBT over - strong current protection
X
P0
Page 28
2
Over voltage or too low voltage protection
O
O
P1
Page 31
3
EEPROM parameter error
O
E5
Page 16
4
Inverter compressor drive error
X
P4
Page 35
5
Inverter compressor drive error
O
P4
Page 35
6
Inverter compressor drive error
P4
Page 35
NO.
PROBLEMS
LED2 (GREEN)
LED3 (RED)
IU DISPLAY
SOLUTION
1
IPM malfunction or IGBT over - strong current protection
X
P0
2
Over voltage or too low voltage protection
O
O
P1
3
EEPROM parameter error
O
E5
4
Inverter compressor drive error
X
P4
5
Inverter compressor drive error
O
P4
6
Inverter compressor drive error
P4