Mitsubishi PUMY-P100YHM Technical & Service Manual page 45

Display
Abnormal point and detecting method
5201
Pressure sensor (63HS)
When detected pressure in high-pressure
sensor is 1 MPa or less during the
operation, the compressor stops and
restarts operation in 3 minutes.
When the detected pressure is 1 MPa or
less at just before of restarting, the
compressor stops due to detecting
abnormality. In this time, <5201> is
displayed.
For 3 minutes after starting compressor,
for defrosting or for 3 minutes after recover
of defrosting, abnormality is not
determined as abnormality.
Connection failure of float switch
5701
connector
Abnormal if detected that the float
switch connector is disconnected(open)
during operation
Current sensor error
5300
Abnormal if current sensor detects –1.5A to
1.5A during compressor operation.
(This error is ignored in case of SW7-1 ON.)
6600
Duplex address error
Detected error when transmission of unit
with the same address is confirmed,
Note) Address/Attribute displayed on the
remote controller shows the controller
detecting abnormality.
6602
Transmission processor H/W error
'' 1 '' shows on the transmission line though
the transmission processor transmitted '' 0''.
Note) Address/Attribute displayed on the
remote controller shows the controller
detecting abnormality.
Causes
1) High-pressure sensor failure
2) Internal pressure decrease by gas
leakage
3) Connector contact failure,
disconnection
4) Multi controller board input circuit
failure
1) Connection failure of connecor(CN4F)
1) Disconnection of compressor wiring
2) Defective circuit of current sensor on
outdoor power circuit board
1) There are 2 units or more with the
same address among the outdoor
unit or indoor unit or lossnay
controller, remote controller.
2) When noise has occurred in the
transmission signal, and the signal
has changed.
1) When the wiring for either of the
indoor unit, the outdoor unit or
lossnay transmission line is
constructed or polarity is changed
with the power supply turned on,
the transmission waves change in
case that the transmission data
collides mutually. It causes to
detect error.
2) Transmission processor circuit
failure
3) When the transmission data has
changed by the noise.
45
Check points
Check the high-pressure sensor.
Check the internal pressure.
Check the high-pressure sensor.
Check the high-pressure sensor.
Check the connection failure of
connector(CN4F) on the indoor
controller board.
Correct the wiring (U·V·W phase) to
compressor.
(Outdoor power circuit board).
Replace outdoor power circuit board.
Look for the unit, which is source of
abnormality with the same address.
When the same address is found,
correct the address and turn off power
supply of outdoor unit, indoor unit,
and lossnay for 2 minutes or more as
the same time. Then, turn on power
supply.
Check the transmitted wave and the
noise on the transmission line.
When the transmission wire is
constructed with the current flowed,
turn off power supply of outdoor unit,
indoor unit and lossnay for 2 minutes
or more as the same time. Then, turn
on power supply.
Check the transmitted wave and the
noise on the transmission line.