Gree GUHD09NK3FO Service Manual page 88

E9 Full Water Protection
Replace the full water switch
F0 Malfunction of Indoor Ambient Temperature Sensor
indoor ambient temperature
sensor on mainboard is inserted
the temperature sensor and
measure if its resistance is
E9 protection
If the unit is
No
installed with
water pump
Yes
Check if the
No
water pump
works normally
Yes
or make sure the float of full
water switch works normally
Malfunction of
indoor ambient
temperature
sensor
Check if the
on the needle
stand correctly
Yes
Disconnect
normal
Yes
Replace the indoor
mainboard
Short circuit the full water
protection interface on indoor
mainboard according to the circuit
diagram
Replace the water pump
Correctly insert the
No
temperature sensor
on the needle stand
No
Replace the
temperature sensor
U-Match Series DC
Inverter Service Manual
85