Outdoor Unit: Malfunction Of Thermistor (R4T) For Suction Pipe - Daikin VRV R-407C PLUS Series Service Manual

SiE 00-07

3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe

J5
Remote Controller
Display
Supposed Causes
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)
Troubleshooting R-407C PLUS Series
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)
Connector
is connected to X14A,
X15A or X20A ofoutdoor unit
PC board(A1P
or A3P).
YES
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.
(3.5kΩ ~
360kΩ)
YES
NO
NO
Troubleshooting
Connect the thermistor and turn on
again.
Replace the thermistor (R4-1(11)T, R4-
2(12)T or R4-13T)
Replace outdoor unit PC board A1P or
A3P.
(VF047)
143