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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
96
3.9
“
C4
” Indoor Unit: Malfunction of Thermistor (R2T) for
Heat Exchanger
Remote
Controller
Display
C4
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by heat exchanger thermistor.
Malfunction
Decision
Conditions
When the heat exchanger thermistor becomes disconnected or shorted while the unit is running.
Supposed
Causes
Defect of thermistor (R2T) for liquid pipe
Defect of indoor unit P.C.B.
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P.166.
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.
Replace the indoor
u
nit P.C.B.
Connect the thermistor and t
u
rn
on again.
N
O
N
O
Replace the thermistor (R2T).
YES
YES
Connector
is connected to X12A
of the indoor
u
nit
P.C.B.
Resistance
is normal
w
hen
meas
u
red after
disconnecting the thermistor
(R2T) from the indoor
u
nit P.C.B.
(3.5
k
Ω
~
360
k
Ω
)
K
Ω
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...