SiMX042215E
Troubleshooting
Part 6 Service Diagnosis
69
4.10 Outdoor Unit PCB Abnormality
Error Code
E1
Method of Error
Detection
The system checks if the microcomputer is working in order.
The system checks if the zero-cross signal comes in properly.
Error Decision
Conditions
The microcomputer program runs out of control.
The zero-cross signal is not detected.
Supposed
Causes
Defective outdoor unit PCB
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting
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.
Contin
u
o
u
sly O
N
, OFF
Blink
YES
(R24717)
N
O
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Gro
u
nd the system.
Zero-cross signal
a
b
normality.
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Check if the o
u
tdoor
u
nit is
gro
u
nded.
Is LED A
b
linking?
Gro
u
nded?
T
u
rn on the po
w
er again.
