7
7
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
7-1. Trouble alarm
Trouble List
Indication on the outdoor unit
When the compressor is interrupted, the outdoor LEDs are used
to indicate the troubles listed below:
Symbols for indicator lights: ★: ON Ο: flashing ×: OFF
LED1 LED2 LED3 Troubles
1
× × ×
Normal
2
× ×
★
Unused
3
×
★
×
Outdoor heat exchanger temperature sensor
be protected
4
★
× ×
Compressor temperature sensor
short-circuited, open circuited or the
corresponding test circuit in trouble
5
★
×
★
Outdoor heat exchanger temperature sensor
short-circuited, open circuited or the
corresponding test circuit in trouble
6
★ ★
×
Outdoor atmosphere temperature sensor
short-circuited, open circuited or the
corresponding test circuit in trouble
9
× × Ο
Signal communication abnormal (indoor –
outdoor)
10
× Ο ×
Power module (IPM)protection
11
★
Ο
★
Maximum current control
12
★
Ο ×
Current overload control
13
× Ο
★
Compressor discharge temperature too high
14
★ ★
Ο
Over and under-voltage control
18
×
★
Ο
Compressor housing temperature too high
19
★ ★ ★
Outdoor memory in trouble
20
× Ο Ο
Indoor heat exchanger temperature sensor
be protected
22
Ο Ο ×
DC compressor fails to start
23
Ο × Ο
DC compressor out of step