Gree LSQWRF35VM/NaA-M Service Manual page 77

(6) Temperature sensor error
(7) Protection for the four-way valve
Test Operation, Troubleshooting and Maintenance
Temperature sensor error
Yes
Is the sensor plug
placed properly into the
main board?
Yes
Remove the sensor and
see if its voltage is
within the safety range?
Yes
Contact the supplier.
Protection for the
4-way valve
Yes
Entering and leaving
water temperature
sensor drop off.
No
Is the 4-way valve
damaged?
No
Does the controller
alarm incorrectly?
No
Contact the supplier.
Check the direction of the
No
sensor probe.
Replace the temperature
No
sensor.
Check the entering and
Yes
leaving water sensors.
Yes Replace the 4-way valve.
If this occurs frequently,
Yes the main board should
be replaced.
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