R410a Full DC Inverter Mini VRF MCAC-VTSM-2013-12
110 Troubleshooting
7.8 EA/E7:
T3 pipe temperature exceeds 27 degrees for more than 5 minutes when heating mode.
(EA is for 8/105/180 model, E7 is for 120~160 model)
LED displays EA/E7
System faulty that T3 pipe temperature exceeds 27
degrees for more than 5 minutes when heating mode.
Whether the outdoor ambient temperature is higher than
the unit
’s operating condition when 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
