Mitsubishi Electric MFZ-KJ25VE Service Manual page 31

MXZ Type
Turn OFF the power supply.
Check once more if the indoor/outdoor connecting wire is not miswiring.
B
Remove the indoor/outdoor connecting wire from outdoor terminal block S3.
Bridge the outdoor terminal block S2 and S3. 1
• Turn OFF inverter-controlled lighting
equipment.
• Turn OFF the power supply and then
turn ON again.
• Press EMERGENCY OPERATION
switch.
Is serial signal
error indicated 6
minutes later?
Yes
B
OBH666C
Turn OFF the power supply.
Is there rated voltage in the power supply?
Yes
Turn ON the power supply.
Is there rated voltage between outdoor terminal block S1 and S2?
Yes
Press EMERGENCY OPERATION switch once.
Does the left lamp of the OPERATION
INDICATOR lamp light up?
<Conf rmation of the power to the indoor unit>
Yes
Is serial signal error indicated 6 minutes later?
Yes
A
C
(Refer to the next page.)
A
• Reinstall
either the unit
or the light
away from
each other.
• Attach a f lter
No
on remote
control receiv-
ing section
of the indoor
unit.
Check the power supply.
No
No
No
Is there any miswiring,
poor contact, or wire
disconnection of the
No
indoor/outdoor connect-
ing wire?
No
1. Miswiring may damage indoor electronic control P.C.
board during the operation.
Be sure to conf rm the wiring is correct before the opera-
tion starts.
31
Check the wiring.
Correct them.
Yes