Mitsubishi Electric R410A, Руководство по обслуживанию

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[8-9 Troubleshooting Inverter Problems (TLMU) ]
- 267 - HWE14080 GB
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8-9-4 Checking the Inverter for Damage at No-Load
Items to be checked Phenomena Remedy
<P72, P96, P120, P144 models> 1) Inverter-related problems
are detected. Turn off SW1-1 and go to section 8-9-2.
(1) Remove power supply. 2) Inverter voltage is not out-
put. Replace the INV board.
(2) Disconnect the inverter out-
put wire from the terminals of
the INV board (SC-U, SC-V,
SC-W). 3) There is an voltage imbal-
ance between the wires.
Greater than 5% imbalance
or 5V Replace the INV board.
(3) Turn on SW1-1 on the INV
board.
(4) Apply power supply. 4) There is no voltage imbal-
ance between the wires. Normal
*Turn off SW1-1.
(5) Put the outdoor unit into oper-
ation.
Check the inverter output
voltage after the inverter out-
put frequency has stabilized.
<P168 model> 1) Inverter-related problems
are detected. Turn off SW1-1 and go to section 8-9-2.
(1) Remove power supply. 2) Inverter voltage is not out-
put. Check the connection between the IPM and the CNIPM
on the INV board.
Replace the IPM.
If the problem persists, replace the INV board.
(2) Disconnect the inverter output
wire from the output terminals (U,
V, W) of the IPM. 3) There is an voltage imbal-
ance between the wires.
Greater than 5% imbalance
or 5V Replace the IPM.
If the problem persists, replace the INV board.
(3) Turn on SW1-1 on the INV
board.
(4) Apply power supply. 4) There is no voltage imbal-
ance between the wires. Normal
*Turn off SW1-1
(5) Put the outdoor unit into oper-
ation.