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3-3) How to check bad COMP terminal of INVERTER COMPRESSOR
● 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.
COMPRESSOR
VESD11C
ENV4A5G-L2B
● 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.)
3-4) How to Check Inverter Input Signal
`
W
Average Resistance Value (at Room Temperature)
On V (Ω)
9.4
9.5
● 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
-> 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.
A section
B section
Abnormal Signal
On W (Ω)
9.4
9.5
(refer to page 40)
Normal Signal (Comp. On)
63
V
U
On U (Ω)
9.4
9.5
Normal Signal (Comp. Off)
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