Thermo Pride CMA3-50D36N Installation And Service Manual page 57

Yes
DOES THE HOT
SURFACE
IGNITOR ENERGIZE
AND GLOW?
Yes
AFTER HOT SURFACE
IGNITOR WARM-UP,
DOES GAS VALVE OPEN?
Yes
Yes
IS THERE LINE VOLTAGE
ACROSS INDUCER POWER
TERMINALS "IND" & "IND N"
AT THE INTEGRATED CONTROL?
CHECK WIRING TO INDUCER
AND IF OK, REPLACE
INDUCER ASSEMBLY.
No IS THERE VOLTAGE PRESENT
AT THE HOT SURFACE
IGNITOR TERMINALS
"IGN" & "IGN N" AT THE
INTEGRATED CONTROL?
CHECK WIRING TO
HOT SURFACE IGNITOR
AND IF OK, REPLACE
HOT SURFACE IGNITOR ASSEMBLY.
CHECK ACROSS "MV"
TERMINALS ON INTEGRATED
No CONTROL FOR 24 VOLTS DURING
THE 4 SECOND FLAME PROVING
PERIOD AFTER IGNITOR WARM-UP.
IS THERE 24VOLTS?
CHECK WIRING TO GAS
VALVE AND IF OK,
REPLACE GAS VALVE.
No
Yes
CHECK THE INTEGRATED CONTROL
No
INTERRUPTING POWER TO CONTROL
Yes
Yes
54
CHECK THE INTEGRATED
CONTROL DIAGNOSTIC LED
LAMP. RESET BY INTERRUPTING
POWER TO CONTROL FOR MORE
THAN ONE SECOND. IF LED STAYS
ON CONTINUOUSLY, REPLACE
INTEGRATED CONTROL.
DIAGNOSTIC LED LAMP. RESET BY
FOR MORE THAN ONE SECOND. IF
LED STAYS ON CONTINUOUSLY,
REPLACE INTEGRATED CONTROL.
No
SAME AS ABOVE.