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Troubleshooting by Indication on the Remote Controller
SiUS28-902_a
123
Troubleshooting
3.30 “
L5
” Outdoor Unit: Inverter Compressor Abnormal
Remote
Controller
Display
L5
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
When an excessive current flows in the power transistor.
(Instantaneous overcurrent also causes activation.)
Supposed
Causes
Defect of compressor coil (disconnected, defective insulation)
Compressor start-up malfunction (mechanical lock)
Defect of inverter P.C.B.
Troubleshooting
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
Caution
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 co
u
ld
b
e damaged.
Compressor inspection
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.
Replace the compressor.
Compressor inspection
Inspect according to the diagnosis
proced
u
re for odd noises,
v
i
b
ration, and operating stat
u
s of
the compressor.
N
O
Replace the in
v
erter
u
nit.
YES
YES
Correct po
w
er s
u
pply.
YES
The compressor
'
s
coil is disconnected or the
ins
u
lation is
defecti
v
e.
N
O
N
O
Disconnect the connection
b
et
w
een the compressor and
in
v
erter. Make the po
w
er
transistor check mode setting
O
N
b
y ser
v
ice mode.
There is
instantaneo
u
s po
w
er
drop.
Summary of Contents for SkyAir FCQ18PVJU
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Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
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