All installations and services must be performed by qualified service personnel.
B. TROUBLESHOOTING CHARTS
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
NO
NO
CONFIRM IF EITHER BLOWER WHEEL IS RUBBING AGAINST HOUSING OR MOTOR SHAFT IS SPINNING FREELY, REPAIR OR REPLACE AS NECESSARY.
CHECK 115V SUPPLY,
CONNECTION FUSES,
SERVICE SWITCH AND
DOOR SWITCH.
DISCONNECT 16 PIN
HARNESS FROM
MOTOR. IS THERE 24V ACROSS PIN12 & PIN1 AND PIN12 & PIN3
AT THE HARNESS PLUG?
YES
|
|
|
|
|
|
NO |
| IS THERE 24V |
|
| |
| ACROSS R & |
| NO | ||
|
| B/C ON THE |
| ||
|
|
|
| ||
|
| INTEGRATED |
|
| |
|
| CONTROL? |
|
| |
|
|
|
|
|
|
|
|
| YES |
| |
|
|
|
| ||
|
|
|
| ||
| DISCONNECT 16PIN |
| |||
|
| HARNESS FROM | NO | ||
| INTEGRATED CONTROL. | ||||
| IS THERE 24V ACROSS |
| |||
|
| PIN12 & PIN1 AND |
| ||
|
| PIN12 & PIN3 |
| ||
|
| AT THE CONROL? |
| ||
YES |
CHECK HARNESS
CONNECTIONS
AND WIRE.
CHECK 24V SUPPLY
TO INTEGRATED CONTROL.
REPLACE
INTEGRATED
CONTROL.
| TURN THERMOSTAT MANUAL FAN |
|
| |
|
|
| ||
| SWITCH ON (IF AVAILABLE) OR JUMPER | NO | ||
| BETWEEN R & G ON INTEGRATED CONTROL. | |||
|
|
| ||
| IS THERE VOLTAGE GREATER THAN |
|
| |
| 12V 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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