Toshiba HFC R407C User Manual

51
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[8A] 1. Multi Controller PC board error.
Multi Controller PC board malfunction
Check lead connection between indoor unit and Multi Controller and outdoor unit.
If no error is detected, replace Multi Controller board (MCC-1210).
Check code Operation cause
[97] 1. Connection error of (XY) for outdoor units.
Central management communication 2. Power source system error of the central
short circuit controller and indoor unit.
3. Noise of peripheral devices.
4. Power failure.
5. Indoor PC board error, central controller error.
Are X,Y communication cables
normal?
Did power failure occur?
Clear the alarm after turning on
the power source, and start the
operation.
Check communication cable.
Indoor PC board error
j
j
h
No
Ye s
Ye s
Ye s
Is the power source of either
central controller or indoor/
outdoor turned on?
Clear the alarm after turning on the
power source, and start the operation.
j
h
No
Ye s
Is there a connection error of
power source wiring?
Check power source wiring.
j
h
Ye s
No
j
No
Is the network address
different from main or sub
remote controller?
Eliminate noise interference.
h
No
Is [97] displayed only on
the central controller?
j
h
No
Ye s
Is the operation status of
the indoor unit reflected on
the central controller?
Is there noise
interference, etc.?
Central controller error
h
h
Is there noise
interference, etc.?
h
No
No
Ye s
No
Ye s
Ye s
j
j
i
i

Toshiba HFC R407C Specifications

General

Brand	Toshiba
Model	HFC R407C
Category	Air Conditioner
Language	English