62-61753-21
P190 CHECK CONDENSER FAN MOTOR
TRIGGER-ON Normal amps for the Condenser Fan Motors are 0.8 to 3.5 Amps (460 VAC). The cir-
cuit tests outside this range.
UNIT CONTROL: Engine and standby operation: Pretrip will fail and display "PRE-TRIP FAIL AND
COMPLETED".
RESET CONDITION: Auto Reset if Pretrip is started again, or alarm may be manually reset via key-
pad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 Page 7-1) Operate the unit through the appropriate modes to see if any active alarm oc-
curs. Continue with the steps below as necessary.
Check Amp Draw of Condenser Fan Motor Circuit
a. With the unit running and calling
for HEAT or cool use a clamp on
ammeter to check the current draw
of all 3 legs.
Must be within range shown in Section 2.11 for all
three legs.
If higher than normal amps are read, the wiring for the
motors must be separated, and each motor tested
individually.
b. Check fuses for condenser fan
motors.
F18, F19, and F20 must not be blown.
c. Check voltage at CDCON con-
tacts.
Must be within range shown in Section 2.11 for L1-L2,
L1-L3, and L2-L3.
Must be within range shown in Section 2.11 for T1-T2,
T1-T3, and T2-T3.
Check Condenser Fan Motors
a. Check condenser fan motors.
No visual physical damage.
No blockage due to debris.
Remove and replace if required.
b. With the unit off, visually check fan
motors and fan blades.
No visual physical damage.
No blockage to fan blades.
Fan blades spin freely.
Remove and replace if required.
c. With the unit off, check the re-
sistance of the condenser fan mo-
tor windings.
See Section 2.11 for correct resistance.
Resistance (Ohms) must be in range.
No continuity from any high voltage lead to ground.
Check Condenser Fan Motor Connections
a. Inspect high voltage connections
at the condenser fan motors.
No corrosion, water damage or burning / discoloration.
Remove, repair, or replace if required.
Verify Accuracy of AC Current Sensor
a. Place SROS in the OFF position.
Put microprocessor in PC Mode.
See Note 5 Page 7.2.
Must have 0 AC1 Amps and 0 AC2 Amps in Unit Data
List.
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