Troubleshooting for Outdoor Unit
SiSG121917E
147
Part 6 Service Diagnosis
7.7 Outdoor Unit PCB Abnormality
Error Code
E1
Outdoor Unit LED
Display
A
j
1
i
2
i
3
i
4
h
5
h
Method of Error
Detection
Detect within the program of the microcomputer.
Error Decision
Conditions
The program of the microcomputer is in abnormal running order.
Supposed
Causes
Defective outdoor unit PCB
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting
(R21
8
09)
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.
YES
N
O
N
O
YES
Replace the o
u
tdoor
u
nit PCB
(main PCB).
Gro
u
nd the system.
The ca
u
se can
b
e external
factors other than malf
u
nction.
In
v
estigate the ca
u
se of noise.
T
u
rn on the po
w
er.
Error again?
Check if the o
u
tdoor
u
nit is
gro
u
nded.
Gro
u
nded?
