Troubleshooting for Outdoor Unit
SiSG121917E
157
Part 6 Service Diagnosis
7.15 Compressor System Sensor Abnormality
Error Code
H0
Outdoor Unit LED
Display
A
j
1
i
2
i
3
h
4
h
5
h
Method of Error
Detection
The system checks the power supply voltage and the DC voltage before the compressor
starts.
The system checks the compressor current right after the compressor starts.
Error Decision
Conditions
The power supply voltage and the DC voltage is obviously low or high.
The compressor current does not run when the compressor starts.
Supposed
Causes
Disconnection of reactor
Disconnection of compressor harness
Defective outdoor unit PCB
Defective compressor
Troubleshooting
Connect the reactor
properly.
(R20419)
N
O
YES
Connect the compressor
properly.
N
O
YES
Replace the reactor.
N
O
YES
Replace the compressor or
the compressor relay
harness.
Restart the operation again
and if the error occ
u
rs
again, replace the o
u
tdoor
u
nit PCB (main PCB).
N
O
YES
Disconnect the reactor from the o
u
tdoor
u
nit PCB and meas
u
re the resistance
v
al
u
e
b
et
w
een reactor terminals
w
ith
m
u
ltimeter.
Disconnect the compressor relay harness
from the o
u
tdoor
u
nit PCB and meas
u
re
the resistance
v
al
u
e
b
et
w
een the each 3
terminals of the compressor
w
ith
m
u
ltimeter.
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Check the reactor.
Check the compressor.
T
u
rn off the po
w
er.
Connection OK?
Connection OK?
10
Ω
or less?
Check the connection of the
reactor.
Check the connection of the
compressor.
10
Ω
or less
b
et
w
een each terminal?
