All installations and services must be performed by qualified service personnel.
45
TURN THERMOSTAT TO CALL FOR HEAT
DOES THERMOSTAT MAKE CONTACT?
IS ROOM TEMPERATURE
BELOW THERMOSTAT
SETTING?
IS ROOM
TEMPERATURE
ABOVE 90 DEGREES F?
TURN T'STAT
SETTING ABOVE
ROOM TEMP.
COOL THE THERMOSTAT
IS THE TRANSFORMER
SUPPLYING 24 VOLTS
TO THE THERMOSTAT?
REPLACE
THERMOSTAT
IS INTERNAL DAMAGE
PRESENT ON THE
TRANSFORMER?
CHECK INPUT
POWER, DOOR
INTERLOCK,
SERVICE SWITCH
AND FUSES.
No
CHECK FOR
CONTINUITY
& PROPER
CONNECTIONS
No
Yes
Yes
REPLACE TRANSFORMER
No
Yes
Yes
No
No
Yes
ARE WIRES CONNECTED
PROPERLY?
No
CORRECT WIRE
CONNECTIONS
No
Yes
Yes
No
Yes
IS THE INDUCER
BLOWER OPERATING?
Yes
IS THERE 24 VOLTS
ACROSS "TH" & "TR"
AT THE INTEGRATED
CONTROL MODEL?
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.
TO USE THIS DIAGRAM, YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES.
NOTE: CHECK DIAGNOSTIC CODE THROUGH VIEW PORT PRIOR TO REMOVING ACCESS DOOR.
Содержание VMA1-50N
Страница 53: ...All installations and services must be performed by qualified service personnel 50 APPENDIX A REPLACEMENT PARTS...
Страница 54: ...All installations and services must be performed by qualified service personnel 51...
Страница 55: ...All installations and services must be performed by qualified service personnel 52 APPENDIX B WIRING DIAGRAM...
Страница 56: ...All installations and services must be performed by qualified service personnel 53...
