[95] Indoor/Outdoor Comunication Short Circuit - Toshiba HFCR407C Service Manual

Check code
[95]
Indoor/outdoor comunication short circuit
Is there a miswiring or
disconnection of PQ
communication cable?
No
Is the connection of CN101 on
the indoor PC board normal?
Yes
Is the connection of CN601
on the outdoor interface PC
board normal?
Yes
Is the power supply of the
outdoor unit turned on?
Yes
Did a power failure occur?
No
Is there noise interference, etc.?
No
Check indoor PC board.
If defective, replace.
NOTE:
1. When first turning on the power supply of the indoor unit, and when pushing the START/STOP button
before turning on the power supply of the outdoor unit, "95" may be displayed. This is not abnormal
therefore clear the check code.
2. If "95" is displayed only on the 7 segment of the outdoor unit, it is considered that power supply of the
master outdoor unit is not switched on, or a PC board error of the master outdoor unit has occurred.
Troubleshooting
Diagnostic procedure for check code
Yes
No
No
No
Yes
Yes
Operation cause
1. Connection error of communication cable (PQ)
between indoor and outdoor units
2. Connection error of connector for indoor
communication, PC board error
3. Connection error of connector for outdoor
communication, interface PC board error
Check communication cable.
Check wiring of wire connector.
Turn on power source of outdoor unit.
Check noise interference etc., and
91
Clear the check code.
remove it.
14