Airwell YEVFD Series, Service Manual

Page: 65 / 92

No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
If connection between pressure
switch and connecting board is
good
If the system pressure meets the
condition that pressure switch
shuts off
Make pressure switch
close, measure if terminal
is conductive by multimeter
If the system is clogged
Make pressure switch terminal
on connecting board in short
circuit, check if failure exists still
If sensor resistor
/characteristic is proper
If sensor terminal is fixed
well
If the system is
lack of refrigerant
Replace connecting
board
Replace pressure switch
and measure again
Re-connect
Replace pressure switch
Check the piping system
Replace connecting board
Reconnect
Replace sensor
Charge refrigerant
[30] High pressure switch shutoff failure
[34] Protection of discharging temp. too high
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