Overview of Primary Product

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LIMITS OPEN
TIME=XXXX:XX:XX
STATUS The controller has completed its internal checks and is standing by for the
interlocks (strip J1, terminal 1) to close.
LOW FIRE FAIL
XX:XX:XX LOCKOUT
LOCKOUT Low fire switch (strip J1, terminal 4) is open just prior to pilot trial for ignition.
MAIN ( ) FAIL
XX:XX:XX LOCKOUT
LOCKOUT Main flame was not established during the main burner trial for ignition
.MAIN FLAME ON STATUS Main valve has been energized and main flame proven during trial for ignition.
MAIN FLAME ON
PILOT OFF
STATUS Pilot valve (strip J2, terminal 5) is de-energized and main flame is on.
MAIN VALVE FAIL
XX:XX:XX LOCKOUT
LOCKOUT Main valve proof-of-closure is open before startup or after burner shutdown.
NO PURGE SELECT
XX:XX:XX LOCKOUT
LOCKOUT No purge time was selected; lockout prior to purge to high fire.
PILOT FLAME FAIL
XX:XX:XX LOCKOUT
LOCKOUT Pilot flame was not established during the pilot trial for ignition.
PILOT ( ) ON
XX
STATUS Pilot flame is proven; transformer is de-energized; remaining countdown for
pilot trial for ignition is “XX”.
PILOT TRIAL FOR
IGNITION XX
Pilot valve and ignition transformer are energized; countdown for pilot trial for
ignition begins at “XX”.
PLT.MVL ENERGIZ.
XX:XX:XX LOCKOUT
LOCKOUT An external source of voltage is present on the ignition, pilot or main output
terminals.
POST PURGE
XX
STATUS 15 second post purge is started on burner shutdown; “XX” shows countdown.
PROGM SWITCH ERR
XX:XX:XX LOCKOUT
LOCKOUT DIP switch improperly set or changed during cycle.
PURGE TO HIGH
FIRE XX
STATUS Modulating motor is sent to high fire; “XX” shows purge countdown.
PURGE TO LOW
FIRE XX
STATUS Modulating motor is sent to low fire; “XX” shows purge countdown.
RECORD #X Part of the optional history log, which records the total number of operating
cycles and the last lockout messages up to a maximum of 10; see “History
Log Activation” further details.
RELAY FAIL
XX:XX:XX LOCKOUT
LOCKOUT Lockout Internal relay(s) fail initial check. Check ratings. If lockout still occurs
after overload is eliminated, replace control.
SAFE START OK STATUS Control has completed internal safe-start check.
UNSAFE AIR SHORT STATUS Combustion air switch is closed before start-up or after shutdown; control
holds start-up until switch re-opens; if interlocks close before switch opens,
alarm is energized.
UNSAFE AIR SHORT
XX:XX:XX LOCKOUT
LOCKOUT Same conditions as above, except the interlocks close before the switch re-
opens, causing a lockout and the alarm being energized.
UNSAFE FLAME ON HOLD Flame signal—actual, induced, or runaway scanner—is detected during the
selected purge time period. The fan is energized. If the cause is corrected
within 30 seconds, as in afterburn, the control will turn off the fan and con-
tinue the
sequence.
UNSAFE FLAME ONXX:XX:XX
LOCKOUT
LOCKOUT Same conditions as above, except the cause has not been corrected within 30
seconds, resulting in a lockout and the alarm being energized.
UNSAFE–FLM–PURGE HOLD Flame signal—actual, induced, or runaway scanner—is detected before start-
up or after shutdown. The fan is energized. If the cause is corrected within 30
seconds, as in afterburn, the control will turn off the fan and continue the
sequence.
UNSAFE–FLM–PURGE
XX:XX:XX LOCKOUT
LOCKOUT Same conditions as above, except the cause has not been corrected within 30
seconds, resulting in a lockout and the alarm being energized.
V–INTERNAL FAULT
XX:XX:XX LOCKOUT
LOCKOUT Internal control failure; replace controller.
MESSAGE TYPE EXPLANATION