Mitsubishi Electric MUZ-GE25VA-a1 Service Manual page 80

MUZ-GE60VA MUZ-GE60VAD MUZ-GE71VA
MUZ-GE80VA MUZ-GE80VA2 MUZ-GE80VAD
Is the bus-bar voltage of the inverter P.C. board normal?
(Refer to "TEST POINT DIAGRAM AND VOLTAGE" of the outdoor unit.)
Does the LED on the inverter P.C. board repeat "3.6-second-OFF and 0.8-sec-
ond-ON quick blinking"? 3
A
• Turn OFF inverter-controlled lighting
equipment.
• Turn OFF the power supply and then
turn ON again.
• Press EMERGENCY OPERATION
switch.
• Reinstall
either the unit
or the light
away from
each other.
Is serial signal
• Attach a fi lter
error indicated 6
No
on remote
minutes later?
control receiv-
Yes
ing section
of the indoor
unit.
B
OBH532E
Turn OFF the power supply.
Is there rated voltage in the power supply?
Turn ON the power supply.
Is there rated voltage between outdoor terminal block S1 and S2?
Press EMERGENCY OPERATION switch once.
Does the upper lamp of OPERATION INDICA-
TOR lamp light up? <Confi rmation of the power
to the indoor unit>
Is serial signal error indicated 6 minutes
later?
Turn OFF the power supply.
Check once more if the indoor/outdoor
B
connecting wire is not miswiring.
Short-circuit outdoor terminal block S2
and S3. 1
Turn ON the power supply.
Turn OFF the power supply.
Remove the short-circuit between outdoor terminal block S2 and S3.
Replace the indoor electronic control P.C. board.
MUZ-GE71VAD
No
Yes
Yes
No
Yes
No
Yes
A
1. Miswiring may damage indoor electronic control P.C.
board during the operation.
Be sure to confi rm the wiring is correct before the opera-
tion starts.
3. Be sure to check this within 3 minutes after turning ON.
After 3 minutes, LED blinks 6 times. Even when the
inverter P.C. board is normal, LED blinks 6 times after 3
minutes.
Yes
No
(Lighted
Yes
or not
lighted)
80
Check the power supply.
No
Check the wiring.
Is there any miswiring,
poor contact, or wire
disconnection of the Correct them.
Yes
indoor/outdoor connect-
ing wire?
No
No
Replace the inverter P.C. board. 2
2. Be careful of the residual voltage of smoothing
capacitor.