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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
128
3.34 “
P4
” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor
Remote
Controller
Display
P4
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Decision
Conditions
When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
Malfunction is not decided while the unit operation is continued.
"
P4
" will be displayed by pressing the inspection button.
Supposed
Causes
Defect of radiator fin temperature sensor
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.
Po
w
er OFF
Po
w
er O
N
Replace the
compressor.
Replace the o
u
tdoor
u
nit P.C.B. (A1P).
End
YES
YES
N
O
N
O
Disconnect the ca
b
le from the
compressor, and then check
the compressor for the
ins
u
lation resistance.
Remo
v
e and insert the fin
thermistor connector [X111A].
The ins
u
lation
resistance is lo
w
(i.e., not
more than
100k
W
.)
T
u
rn O
N
the
po
w
er s
u
pply, and
then check
w
hether or not
the malf
u
nction
rec
u
rs.
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...