All installations and services must be performed by qualified service personnel.
THIS GUIDE SHOULD BE USED IN THE CASE OF A STOPPED OR MANFUNCTIONED ECM BLOWER MOTOR. THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF MALFUNCTION OR DEVIATION FROM THE NORMAL BLOWER OPERATION.
TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES.
DOES BLOWER SPIN FREELY?
YES
IS THERE 115V
SUPPLIED TO MOTOR?
YES
DISCONNECT 16 PIN
HARNESS FROM MOTOR. IS THERE 12VDC ACROSS PIN12 & PIN1
AND PIN12 & PIN3
AT THE HARNESS PLUG?
|
| CONFIRM IF EITHER BLOWER |
| NO | WHEEL IS RUBBING AGAINST |
| ||
| HOUSING OR MOTOR SHAFT | |
|
| |
|
| IS SPINNING FREELY, REPAIR |
|
| |
|
| OR REPLACE AS NECESSARY. |
|
|
|
| CHECK 115V SUPPLY, |
NO | CONNECTION FUSES, |
| SERVICE SWITCH AND |
| DOOR SWITCH. |
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|
| IS THERE 24VAC |
|
|
|
NO | ACROSS R & | NO | CHECK 24VAC | |
| B/C ON THE | |||
|
| TO INTEGRATEDSUPPLY | CONTROL. | |
| INTEGRATED |
|
|
|
| CONTROL? |
|
|
|
|
|
|
|
|
| YES |
|
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|
|
|
|
| |
YES
DISCONNECT 16PIN
HARNESS FROM
INTEGRATED CONTROL. IS THERE 12VDC ACROSS
PIN 6 & PIN 1
AT THE CONROL?
YES
CHECK HARNESS
CONNECTIONS
AND WIRE.
NOREPLACE 
INTEGRATED
CONTROL.
TURN THERMOSTAT MANUAL FAN |
| |
SWITCH ON (IF AVAILABLE) OR JUMPER | NO | |
BETWEEN R & G ON INTEGRATED CONTROL. | ||
| ||
IS THERE VOLTAGE GREATER THAN |
| |
12VDC BETWEEN PIN15 & PIN1? |
| |
|
| |
YES |
|
CHECK CONNECTION ON HARNESS AND MOTOR,
RECONNECT HARNESS TO MOTOR, IF
CONNECTIONS ARE GOOD AND MOTOR STILL
DOES NOT RUN REPLACE MOTOR.
CHECK CONNECTIONS AND WIRES AT INTEGRATED CONTROL, IF OK REPLACE INTEGRATED CONTROL.
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