Toshiba MMY-MUP0721FT6P-UL Service Manual page 222

▼Points to Note When Servicing Compressor
(1) When checking the outputs of inverters, remove the wiring from all the compressors.
▼How to Check Inverter Output
(1) Turn off the power supply.
(2) Remove compressor leads from the compressor P.C. board.
(3) Turn on the power supply and start cooling or heating operation.
(4) Check the output voltage across each pair of inverter-side. If the result is unsatisfactory according to the
judgment criteria given in the table below, replace the compressor P.C. board.
<Target model：MMY-MUP****FT6*>
No. Measured point
1 CN201 – CN202
2 CN202 – CN203
3 CN203 – CN201
Criterion
280V – 460V
280V – 460V
280V – 460V
W：BLACK lead wire(CN203)
V：WHITE lead wire(CN202)
U：RED lead wire(CN201)
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