Daikin FXYBP20K7V1, Service Manual

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Troubleshooting SiE 00-07
144 Troubleshooting R-407C PLUS Series
3.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger
Remote Controller
Display
J6
Supposed Causes Defect of thermistor (R2-1(11)T, R2-2(12)T or R2-13T) for outdoor unit coil
Defect of outdoor unit PC board (A1P)
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
Note: 16~20HP class ··· R2-1T, R2-2T (A1P)
24~30HP class ··· R2-11T, R2-12T (A1P), R2-13T (A3P)
(VF048)
Resistance
is normal when
measured after
disconnecting the thermistor
(R2-1(11)T, R2-2(12)T or
R2-13T) from the indoor
unit PC board.
(3.5k
Ω
~
360k
Ω
)
Replace outdoor unit PC board A1P or
A3P.
Connect the thermistor and turn on
again.
NO
NO
Replace the thermistor (R2-1(11)T, R2-
2(12)T or R2-13T)
YES
YES
Connector
is connected to X18A or
X19A ofoutdoor unit PC
board (A1P or
A3P).