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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
126
3.32 “
L9
” Outdoor Unit: Inverter Start up Error
Remote
Controller
Display
L9
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
When overload in the compressor is detected during startup
Supposed
Causes
Defect of compressor‘
Pressure differential start
Defect of outdoor unit P.C.B. (A1P)
Troubleshooting
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.
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.
Unsatisfactory press
u
re
e
qu
alization
Check refrigerant system.
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.
YES
Replace o
u
tdoor
u
nit P.C.B.
(A1P).
N
O
N
O
Reset and restart.
N
O
The difference
b
et
w
een high and lo
w
press
u
re
w
hen starting
is a
b
o
v
e
30psi.
YES
YES
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.
After t
u
rning
on again, "L9"
b
links
again.
Summary of Contents for SkyAir FCQ18PVJU
Page 1: ...Split System Air Conditioners SkyAir Inverter R 410A Heat Pump 60Hz P Series SiUS28 902_a...
Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
Page 185: ...SiUS28 902 Precautions for New Refrigerant R 410A Precautions for New Refrigerant R 410A 178...