40
£
LOCKOUT CODES
During an alarm condition, the Alarm LED
is made to flash at approximately a twice per
second rate. The remaining LED’s are illuminated as a coded sequence identifying the reason for the
lockout. This remains true if power is removed and then restored in a locked out condition.
Table 4:
LED DISPLAY READOUT
z
= ON
LOCKOUT MESSAGE
FAN
OPEN
DAMPER
CLOSE
DAMPER
AUTO
IGN
FLAME
T13 FUEL VALVE END
SWITCH OPEN
z
z
M-D LOW FIRE START
OPEN
z
z
M-D LOW FIRE START
OPEN - PTFI
z
z
z
M-D LOW FIRE START
OPEN - MTFI
z
z
z
z
M-D CLOSED
z
z
M-8 CLOSED
z
z
M-8 HIGH PURGE CIRCUIT
OPEN
z
FALSE FLAME-STANDBY
z
z
FLAME FAIL PTFI
z
z
z
z
FLAME FAIL - MTFI
z
z
z
z
z
FLAME FAIL AUTO
z
z
z
3-P RUN INTLK OPEN -
PREPURGE
z
z
z
3-P RUN INTLK OPEN -
PURGE
z
z
z
3-P RUN INTLK OPEN-PTFI
z
z
3-P RUN INTLK OPEN-MTFI
z
z
z
3-P RUN INTLK CLOSED-
STANDBY
z
3-P RUN INTLK OPEN-
AUTO
z
FUEL VALVE STATE
CHANGE
z
CHECK FUSE
z
z
z
CHECK WIRING
z
z
z
CHECK SCANNER
z
z
z
CHECK PROGRAMMER
z
z
CHECK CHASSIS
z
CHECK EXPANSION
MODULE
z
z
z
z