Stopped Or Malfunctioned Ecm Motor - Carrier PTV Installation, Start-Up And Service Instructions Manual

Stopped or Malfunctioned ECM Motor -- Refer
to Fig. 43 to determine the possible cause of a stopped or mal-
functioned ECM motor. Follow the instructions in the boxes.
DOES BLOWER SPIN FREELY? I
YES
NO
CONFIRM _F EITHER BLOWER
WHEEL IS RUBBING AGAINST
HOUSING OR MOTOR SHAFT
IS SPINNING FREELY, REPA1R
OR REPLACE AS NECESSARY.
IS THERE 115V
SUPPUEO TO MOTOR?
T YES
D_SCONNECT 16 P_N
HARNESS FROM
MOTOR. IS THERE 24V
ACROSS PIN12 & PIN'I
AND P_N12 & PIN3
AT THE HARNESS PLUG?
YES
NO
'CHECK 115V SUPPLY,
CONNECTION FUSES_
SERVICE SWITCH AND
DOOR SWITCH.
NO
I STHERE24V
ACROSS R &
B/C ON THE
_NTEGRATED
CONTROL?
I YES
DISCONNECT 16PIN
HARNESS FROM
INTEGIRA,TED CONTROL
_STHERE 24V ACROSS
PIN12 & HNt AND
PIN12 & P_N3
AT THE CONROL?
YES
CHECK HARNESS
CONNECTIONS
AND WIRE.
l CHECK 24V SUPPLY l
NO _ TO #_,_TEGRATEDCONTROL
NO _ REPLACE
_NTEGRATED
CONTROL.
TURN THERMOSTAT MANUAL FAN
SWITCH ON {_F AVAL_BLE) OR JUMPER
BETWEEN R & G ON INTEGRATED CONTROL.
IS THERE VOLTAGE GREA_R THAN
12V BE'P¢TEEN P_N15 & PIN1?
NO
j[ CHECK CONNECTIONS _D W_RES
AT INTEGRATED CONTROL IF OK
REP_CE INTEGRATED CONTROL
YES
CHECK CONNECTION ON HARNESS ,AND MOTOR,
RECONNECT HARNESS TO MOTOR ;F
C_NECT_ONS ARE GOOD AND MOTOR STIL
DOES NOT RUN REPLACE MOTOR_
Fig. 43 -- ECM Troubleshooting Flow Diagram
51