All installations and services must be performed by qualified service personnel.
TROUBLESHOOTING GUIDE
THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR
HEAT. THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF
MALFUNCTION OR DEVIATION FROM THE NORMAL OPERATION.
NOTE: REFER TO PAGE 48 FOR DEFINITION OF DIAGNOSTIC LEDS.
TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES.
SET THERMOSTAT TO CALL FOR HEAT
(MAKE CERTAIN ROOM TEMPERATURE IS BELOW THERMOSTAT SETTING)
IS THE INDUCER
BLOWER OPERATING?
NO
IS THERE 120 VOLTS ACROSS "L1" AND "NEUTRAL" AT THE
YES
NO
CHECK INPUT POWER, DOOR INTERLOCK, SERVICE SWITCH AND FUSES
IS THERE 24 VOLTS ACROSS "TH" & "TR"
AT THE INTEGRATED CONTROL MODEL
YES
YES
IS THERE 24V
ACROSS R AND B/C
YES
NO
NO
CHECK 115 VOLT
CONNECTIONS. IF OK,
REPLACE TRANSFORMER
CHECK FUSE ON
W/R
IS THERE 24 VOLTS | YES |
ACROSS "R" AND "W1"?
NO |
| IS THERE LINE VOLTAGE |
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| ACROSS INDUCER POWER |
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| TERMINALS "IND HI" TO |
| NO | ||
| "IND N" OR "IND LO" TO |
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| |
| "IND N" AT THE |
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| CONTROL? |
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| YES |
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CHECK WIRING TO INDUCER
AND IF OK, REPLACE
INDUCER ASSEMBLY.
CHECK WIRING TO
THERMOSTAT. IF OK, REPLACE THERMOSTAT.
REPLACE THE
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