Troubleshooting Cooling Chart - Carrier 50SS018-060 Installation, Start-Up And Service Instructions Manual

SYMPTOM
Integrated control motor
(units 50SX048 208/230 v
and 50SX060)
IFM does not run.
Integrated control motor (units
50SX048 208/230 v
and 50SX060)
IFM runs when it should be off.
Integrated control motor (units
50SX048 208/230 v
and 50SX060)
IFM operation is intermittent.
IFM — Indoor (Evaporator) Fan Motor
TROUBLESHOOTING COOLING CHART (cont)
CAUSE
Blower wheel not secured to shaft.
Insufficient voltage at motor
Power connectors not properly seated
Motor programmed with a delay profile
With thermostat in OFF the voltage on
G,Y1,Y/Y2,W with respect to common,
should be less than 1 ⁄
2
voltage supply
Water dripping into motor
Connectors not firmly seated
Properly tighten blower wheel to shaft.
Determine cause and correct.
Connectors should snap easily; do not force.
Allow a few minutes for motor to shut off.
If measured voltage is more than
mostat is incompatible with motor. If voltage is
of actual low less than
Verify proper drip loops in connector wires.
Gently pull wires individually to be sure they
are crimped into the housing.
43
REMEDY
1 ⁄ , the ther-
2
1 ⁄ , the motor has failed.
2