Mitsubishi MUY-A15NA, Руководство по обслуживанию

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49
MUZ-A09/12/15/17 MUY-A15/17
Outdoor unit does not operate at all, or stops immediately due to overcurrent.
Check of current-limiting resistor
K
●
Check other electric parts in the main circuit together in the case that the current-limiting resistor is defective.
Turn ON the power
supply and press
EMERGENCY
OPERATION switch.
Replace the inverter P.C.
board or the compressor.
Replace the power P.C.
board or the inverter P.C.
board.
Does the rush current
limiting relay(X64) work
properly? (Normally it
closes 1 second after
outdoor unit power ON.)
No
Yes
No
No
Yes
Yes
Is the resistance of current-limiting
resistor (R64A or R64B) on the
power P.C. board normal?
(Normal resistance : 5
’
i
5%)
Replace the power P.C.board.
Replace the power P.C. board.
Does LED on the inverter
P.C. board light up?
When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly.
Outdoor unit does not operate at all, or stops immediately due to overcurrent.
Check of current-limiting resistor
K
●
Check other electric parts in the main circuit together in the case that the current-limiting resistor is defective.
Turn ON the power
supply and press
EMERGENCY
OPERATION switch.
Replace the outdoor
electronic control P.C.
board or power P.C.board
or the compressor.
Replace the noise filter P.C.
board or the outdoor
electronic control P.C.
board.
Does the rush current
limiting relay(X64) work
properly?
Open
Not
open
No
No
Yes
Yes
Is the resistance of current-limiting
resistor (R64A or R64B) on the
noise filter P.C. board normal?
(Normal resistance : 5
’
i
5%)
Replace the noise filter P.C.board.
Replace the power P.C. board.
Does LED on the outdoor
electronic control P.C. board
light up?
When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly.
MUZ-A24 MUY-A24
OB451--2.qxp 06.3.29 9:49 AM Page 49