Si33-105 Troubleshooting
Troubleshooting R407C PLUS Series Heat Recovery System 177
3.21 Outdoor Unit: Malfunction of Thermistor (R6T) for
Suction Pipe
Remote
Controller
Display
J5
Supposed
Causes
!
Defect of thermistor (R6T) 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.
(VF047)
Resistance
is normal when
measured after
disconnecting the thermistor
(R6T) from the outdoor
unit PC board.
(3.5kΩ~360kΩ)
Replace outdoor unit PC board
A1P.
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor (R6T).
YES
YES
Connector
is connected to X13A,
of outdoor unit
PC board (A1P).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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