Daewoo Q600 series, Service Manual

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● Inverter Input Signal Waveform section CHECKING
-> Normal Signal : Signal is formed at A section
-> Abnormal Signal : Signal is formed in B section out of A section
(refer to page 40)
-> High Level of the pulse at normal start-up should be at least 5V or
more, while Low Level should be 0.7V or less.
U
V
W
● Note
The higher the temperature of the coil of the motor is, the larger the resistance will be.
(If power is normally supplied, it means COMP state is good.)
Average Resistance Value (at Room Temperature)
COMPRESSOR On V (Ω) On W (Ω) On U (Ω)
VESD11C 9.4 9.4 9.4
ENV4A5G-L2B 9.5 9.5 9.5
3-3) How to check bad COMP terminal of INVERTER COMPRESSOR
3-4) How to Check Inverter Input Signal
`
A section
B section
Abnormal Signal Normal Signal (Comp. On)
Normal Signal (Comp. Off)
● COMP or Resistance value CHECKING
-> Resistance value on V = on W + on U
-> Resistance value on W = on V + on U
-> Resistance value on U = on W + on V
=> Normal: Resistance values on W, V, U agree with each other.
=> Abnormal: Resistance values on W, V, U do not agree with each other.
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