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Fault Handling
D. Troubleshooting and fault handling of electronic expansion valve
There are two steps for troubleshooting and fault handling of electronic expansion valve. First, inspect the coil of electronic expansion valve.
If the coil part is normal, check the valve body.
(1) Fault analysis and handling of electronic expansion valve: follow the procedure below.
Inspection and repair process of electronic expansion valve
If there is a
click sound after
connecting power.
Check if the coil
is properly fit to
the body
Check if the conductors
are properly connected
with terminals.
Check if the coil is
properly connected to
circuit board.
Check if the coil
is powered normally.
Check if the coil
resistance is normal
Check if the circuit
board is normal
The coil is normal,
check the valve body.
Replace or repair
the circuit board
Replace
the coil
Fit properly
Connect properly
Connect properly
No
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
