Service manual

50
•Check magnetic contactor (only for AE522SC - AE522SC3 )
•Check coil resistance of magne-
tic contactor. (52C or MG)
•Check negative phase relay (only for AER522SCL3 - AE522SC3)
5) COMPRESSOR MOTOR DOES NOT RUN (only for SAP AE522SC)
a) Single phase systems 230V - 1 - 50 Hz
OK
It has tripped
NO
NO
YES
•Refrigerant gas shortage.
•Check power supply voltage. Is
voltage abnormally low?
•Is outdoor heat exchanger coil
dirty or are there obstacles near
air suction inlet of outdoor unit?
•Check overload relay and/or
compressor motor internal pro-
tector. (OLR - 49C)
•Measure resistance of compres-
sor motor winding.
•Is temperature of compressor
abnormally high?
•Check compressor motor capaci-
tor. (C1)
YES
•Rewire power supply wires.
•Check negative phase relay to
see if it has operated. (47C)