28
●
With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if
the inverter is normal by measuring the balance of voltage between the terminals.
Output voltage is 50 - 130 V. (The voltage may differ according to the tester.)
<< Operation method>>
Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION
: Refer to 8-3.)
<<Measurement point>>
At 3 points
BLK (U) - WHT (V)
BLK (U) - RED (W)
WHT (V) - RED (W)
NOTE
: 1. Output voltage varies according to power supply voltage.
2. Measure the voltage by analog type tester.
3. During this check, LED of the inverter P.C. board
fl
ashes 9 times. (Refer to 11-6.4.)
Refer to 11-5. “Check of compressor
operation time”.
Does the compressor operate continuously?
Refer to 11-5. “Check of compressor start failure”.
OK.
No
Yes
Refer to 11-5. “Check of compressor
winding”.
Is the compressor normal?
Replace the compressor.
No
Yes
C Check of compressor
MUZ-GB50VA-
E3
D Check of compressor winding
●
Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be-
tween the compressor terminals.
<<Measurement point>>
at 3 points
BLK-WHT
BLK-RED
WHT-RED
<<Judgement>>
Refer to 11-4.
0 [
Ω
] ················Abnormal [short]
Infinite [
Ω
] ·······Abnormal [open]
NOTE
: Be sure to zero the ohmmeter before measurement.
Measure the resistance between the lead wires at 3 points.
MUZ-GB50VA-
E3
Measure AC voltage between the
lead wires at 3 points.
9-time flash
2.5-second OFF
B Check of open phase
MUZ-GB50VA-
E3
Summary of Contents for MUZ-GB50VA
Page 8: ...8 MUZ GB50VA E3 ...
