Troubleshooting by Indication on the Remote Controller
SiUS28-902_B
132
Service Diagnosis
3.34 Inverter Startup Error
Remote
Controller
Display
L9
Applicable
Models
RZR, RZQ
Method of Error
Detection
The error is detected from current flowing in the power transistor.
Error Decision
Conditions
When overload in the compressor is detected during startup
Supposed
Causes
Stop valve is not opened.
Overcharge of refrigerant
Defective compressor (lock)
Pressure differential startup
Defective outdoor unit PCB (A1P)
Troubleshooting
The
difference
b
et
w
een high and lo
w
press
u
re
b
efore start
u
p
is a
b
o
v
e 30psi.
In
v
erter
o
u
tp
u
t
v
oltage
check. In
v
erter
o
u
tp
u
t
v
oltage is not
b
alanced. (
N
ormal if
w
ithin
±
5
V
) M
u
st
b
e meas
u
red
w
hen fre
qu
ency is
sta
b
le.
After t
u
rning
O
N
again, "
L9
"
b
links
again.
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.
Ins
u
fficient press
u
re e
qu
alization
Check refrigerant system.
Compressor inspection
Inspect according to the diagnosis
proced
u
re for a
b
normal noises,
v
i
b
ration and operating stat
u
s of
the compressor.
Replace the o
u
tdoor
u
nit PCB
(A1P).
Reset and restart.
Disconnect the connection
b
et
w
een the compressor and
in
v
erter. Make the po
w
er
transistor check mode O
N
b
y
ser
v
ice mode.
Caution
N
O
YES
N
O
YES
N
O
YES
