MCAC-VTSM-2014-10 R410A All DC Inverter Mini VRF
Troubleshooting 99
7.15 PE/P7 malfunction: Evaporator T2 high temperature protection
(PE is for 8/105 model, P7 is for 120~160 model)
When the middle average temperature of the evaporator is higher than 63 degrees for 50 seconds, the
unit will stop operating. When pipe temperature is lower than 50 degrees, the unit will resume running.
Evaporator T2 high temperature protection
Check whether average temperature of evaporator is
higher than 63 degrees for 50 seconds or not.
Check whether the resistance of evaporator
temperature sensor is correct.
Replace outdoor main PCB.
Replace temperature sensor.
If indoor temperature is too high or not(exceeds the using
range of the unit.)
Replace outdoor main PCB.
Whether the heat exchanger needs cleaning.
Whether the refrigerant pipe is blocked.
Remove the refrigerant pipe and then
use high pressure nitrogen or refrigerant
to blow the pipe. Vacuums the pipe then
add the refrigerant again.
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