Daikin VRV R-407C PLUS Series, Service Manual

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SiE 00-07 Troubleshooting
Troubleshooting R-407C PLUS Series 143
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe
Remote Controller
Display
J5
Supposed Causes Defect of thermistor (R4-1(11)T, R4-2(12)T or R4-13T) for outdoor unit suction pipe
Defect of outdoor unit PC board (A1P)
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
Note: 16~20HP class ··· R4-1T, R4-2T (A1P)
24~30HP class ··· R4-11T, R4-12T (A1P), R4-13T (A3P)
(VF047)
Resistance
is normal when
measured after
disconnecting the thermistor
(R4-1(11)T, R4-2(12)T or
R4-13T) 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 (R4-1(11)T, R4-
2(12)T or R4-13T)
YES
YES
Connector
is connected to X14A,
X15A or X20A ofoutdoor unit
PC board(A1P
or A3P).