Mitsubishi Electric MU-GA20VB-E1, Руководство по обслуживанию

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19
Compressor
(MC)
INNER
PROTECTOR
MU-GA20/
GA25VB-
150
i
5°C OPEN
90
i
10°C CLOSE
MU-GA20/
GA25VB-
160
i
5°C OPEN
90
i
10°C CLOSE
OVERLOAD
RELAY
MU-GA35VB
140
i
5°C OPEN
75
i
5°C CLOSE
E2
E1
Part name
Outdoor fan
motor
(MF)
INNER FUSE
145
i
2°C
CUT OFF
Check method and criterion
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Figure
P
R
C
S
RED
BLK
WHT
MAIN AUX.
R
R
C
S
MAIN AUX.
Normal
MU-GA20/GA25VB
323 ~ 396
Ω
241 ~ 296
Ω
189 ~ 233
Ω
270 ~ 332
Ω
WHT-BLK
BLK-RED
WHT RED BLK
MAIN
AUX.
FUSE
MU-GA20VB
MU-GA25VB
MU-GA35VB
Normal
MU-GA20/GA25VB-
E1
3.41~4.18
Ω
5.41~6.63
Ω
MU-GA20/GA25VB-
E2
3.19~3.91
Ω
4.76~5.83
Ω
2.46~3.01
Ω
4.79~5.56
Ω
C-R
C-S
MU-GA35VB
MU-GA35VB
P INNER PROTECTOR
Color of
lead wire
9-3. Trouble criterion of main parts
A A
Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER
Start
Turn OFF the power supply (indoor / outdoor unit).
Set switch (SW2-
2
) on the indoor electronic
control P.C. board to MU type.
w
1
Does the unit operate? OK
Yes
No
Refer to the
"Instruction of
troubleshooting."
w
1 Set the switch (SW2-
2
) on the indoor electronic control P.C. board to
MU type, when the outdoor unit is MU type.
If the setting is MUH or MXZ type, the unit does not work.
Refer to "MU & MUX TYPE / MUH& MXZ TYPE SWITCH OVER AND
AUTO RESTART FUNCTION" on the indoor unit service manual.
When OPERATION INDICATOR lamp flashes 0.5-second intervals.
Outdoor unit doesn’t operate.
Indoor unit MSC type
9-4. Troubleshooting flow
MU-GA35VB
MU-GA20/GA25VB
R OVERLOAD RELAY
OB386B.qxp 06.4.25 11:23 AM Page 19