Troubleshooting 81
4.7
E7: Discharge Sensor Malfunction
T3 pipe temperature exceeds 27 degrees for more than 5 minutes under
heating mode.
4.9 E8/Eb malfunction (E8 display on 12~16kW; Eb display on 18kW)
E8/Eb will display if E6 faulty happens twice in 10 minutes continuously. Malfunction checking method is
the same as E7/EA(refers to the aboved).
LED
displays E7
System faulty that T3 pipe temperature exceeds 27
degrees for more than 5 minutes under heating mode.
Whether the outdoor ambient temperature is higher than
the unit’s operating condition under heating mode.
YES
Belongs to system
normal protection
NO
Check whether the refrigerant volume of the system is
added according to the requirement and check if the
refrigerant leaks.
YES
Connect the pipe again,
check leakage, insure the
pressure & add the
refrigerant.
NO
Check whether the condenser is
blocked?
YES
Rectify the pipe system.
Replace main PCB
NO
Check whether the resistance of condenser
temperature sensor is correct.
Replace temperature sensor
NO
YES
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