R410A Mini Split Chiller 50Hz
MCAC-ATSM-2014-01
50
Pb:
System anti-frozen protection
P8:
Inlet water temperature protection (three times in one hour and system should be powered on again). At
spot checking time, the wired controller displays P4
-----Refer to the P4 to solve the problem.
LED indicates Pb
Check whether the circulation water is insufficient:
(Q<0.6
×
Q
rated
).
Yes
Check the water system and make
adjustment.
Check whether the plate heat exchanger temperature
sensor is abnormal.
No
Yes
Replace the temperature sensor.
No
Check whether the ambient temperature is too low (in
cooling mode).
Yes
Adjust outdoor fan and increase the outdoor
air flow.
