Troubleshooting Guide - Thermo Pride CMA3-50D36N Installation And Service Manual

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.
TURN THERMOSTAT TO CALL FOR HEAT
DOES THERMOSTAT MAKE CONTACT?
IS ROOM TEMPERATURE
Yes BELOW THERMOSTAT
SETTING?
IS THE TRANSFORMER
SUPPLYING 24 VOLTS
TO THE THERMOSTAT?
REPLACE
THERMOSTAT
Yes
IS THE INDUCER
BLOWER OPERATING?

TROUBLESHOOTING GUIDE

No
ABOVE 90 DEGREES F?
Yes
COOL THE THERMOSTAT
No
ARE WIRES CONNECTED
Yes
IS INTERNAL DAMAGE
PRESENT ON THE
REPLACE TRANSFORMER
No
Yes
No
IS ROOM
TEMPERATURE
Yes
PROPERLY?
Yes
TRANSFORMER?
Yes
IS THERE 24 VOLTS
ACROSS "TH" & "TR"
AT THE INTEGRATED
CONTROL MODEL?
Yes
53
No
TURN T'STAT
SETTING ABOVE
ROOM TEMP.
No CORRECT WIRE
CONNECTIONS
CHECK INPUT
No
POWER, DOOR
INTERLOCK,
SERVICE SWITCH
AND FUSES.
No CHECK FOR
CONTINUITY
& PROPER
CONNECTIONS