SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
127
3.30 Outdoor Unit PCB Abnormality
Remote
Controller
Display
L1
Applicable
Models
RZR, RZQ
Method of Error
Detection
The error is detected by current value during waveform output before compressor startup.
The error is detected by current sensor value during synchronized operation at the time of
startup.
The error is detected using an SP-PAM series capacitor overvoltage sensor.
Error Decision
Conditions
In case of overcurrent (OCP) during waveform output
When the current sensor errors during synchronized operation
When overvoltage occurs in SP-PAM
In case of IGBT error
Supposed
Causes
Defective outdoor unit PCB (A1P)
IPM failure
Current sensor failure
SP-PAM failure
Defective IGBT or drive circuit
Troubleshooting
Does it ret
u
rn normally?
T
u
rn OFF the po
w
er
s
u
pply once and then t
u
rn
it O
N
again.
External factor (
N
oise,
etc.).
Replace the o
u
tdoor
u
nit
PCB (A1P).
PCB e
qu
ipped
w
ith a
resin case
YES
N
O
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
Caution
( )
