Gree CB11500430, Руководство по обслуживанию, Страница: 54 / 67

Troubleshooting
9.2.3.6 Diagnosis of overload and discharge malfunction (outdoor unit malfunction)
Indoor display: H3 (dual-8 display), heating indicator is off for 3S and blinks 3 times.
E4 (dual-8 display), operation is off for 3S and blinks 4 times.
Main detection point:
z
Is the electron expansion valve connected well? Is the expansion valve damaged?
z
Is there refrigerant leakage?
z Is the overload protector damaged?
z Is the discharge temperature sensor damaged?
Malfunction diagnosis process:
Connect wire
well with wiring
diagram
Check there is block for
electronic expansion valve
If the wiring terminal FA of electron expansion is well
connected?
Remove mulfunction?
Check if electronic expansion
valve coil is installed on the
valve body normally.
Finish
After the unit
de-energized
for 20min
Remove mulfunction?
Y
N
N
N
If the overload protector SAT is well
connected?
N
Under ambient temperature, test the resistance of overload of overload
protector with ohmic meter, resistance value is less than 1000 ƻ
Y
Y
Replace
overload
protector SAT
N
Y
Y
Check refrigerant, if there is leakage,
please refer to specification
Replace outdoor
control board
Check if the discharge temperature senor
is normal with temperature sensor
resistance value meter
Y
N
Replace discharge
temperature sensor
51