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