Toshiba MMU-P0121H Service Manual page 75

Check code
[95]
Communication alarm between
indoor and outdoor
Is there no miswiring/
disconnection of PQ
communication cable?
NO
Is connection of CN101
connector of indoor main P.C. board
(MCC-1361) normal?
YES
Is connection of
CN601 connector on outdoor
interface P.C. board normal?
YES
Is power supply of
outdoor unit turned on?
YES
Did a power failure occur?
NO
Is there noise source, etc.?
NO
Check indoor main
P.C. board (MCC-1361).
Defective Replacement
NOTE :
1. When turning on power supply of the indoor unit first of all, and pushing the START/STOP button before
power supply of the outdoor unit is turned on, "95" may be displayed. This is not abnormal, and then 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 P.C. board error of the master outdoor unit occurs.
1. Connection error of communication cable (PQ) between
indoor and outdoor
2. Connection error of connector for indoor communication,
P.C. board (MCC-1361) error
3. Connection error of connector for outdoor communication,
interface P.C. board error
YES
NO
NO
NO
YES
YES
3-72
Operation cause
Modify communication cable.
Modify wiring of wire connector.
Turn on power supply of outdoor unit.
Clear the check code.
Check noise, etc., and remove it.