System information

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Table 3: EXPLANATION OF LOGSTAT
Logstat represents the current software module the Flame-Monitor is currently executing. They are
named as close to the logic module the actual burner sequence is in. For instance, in the Flame-Mon-
itor, MPURGE represents High Fire Purge where MPOSTPURGE represents the low fire start period
where the mod motor is sent to the low fire position in preparation for pilot light-off. MSHUTDWN1
represents the post purge period after a complete cycle or the cool down period after a lockout.
MIDLE or STANDBY is the period of time where the operating control is open or the control is in
lockout waiting for reset. On instances of false flame during the purge period, the control algorithm
forces the control back to STANDBY until false flame ceases or lockout occurs.
MPREPURGE1 is the period of time prior to PURGE where the control checks the status of the air
flow interlocks or the high fire proving switch (D-8). If either switch is found open, the control will
remain in this state until the respective switch closes or lockout occurs.
MTFI represents the pilot trial for ignition stage of a burner sequence. MTFMF represents the main
trial for main flame period where main fuel is introduced along with pilot and igniter.
MAUTO is the run period of the burner sequence.
MPOSTIDLE and MSHTDWN2 are small periods of time where certain internal tests are conducted
and general cleanup before and after a cycle is performed.
The Flame-Monitor outputs the current displayed message as well as the historical lockout messages
as numbers. The table below correlates the message number with the actual displayed test message.
Table 4:
LOGIC DISPATCHER
VALUE MODULE FUNCTION
DEC HEX
69 45H MPOSTIDLE
70 46H MPREPURGE1 WAIT FOR AIR FLOW AND/OR HIGH FIRE SWITCH TO CLOSE
71 47H MPURGE OPEN DAMPER PURGE
72 48H MPOSTPURGE LOW FIRE START
73 49H MTFI PILOT TRIAL
74 4AH MTFMF MAIN TRIAL
75 4BH MAUTO AUTO
76 4CH MSHTDWN1 POST PURGE
77 4DH MSHTDWN2 POST PURGE
78 4EH MIDLE STANDBY
DEC HEX E110 FLAME-MONITOR MESSAGES
1 1 L1-13 OPEN
2 2 FALSE FLAME - STANDBY
3 3 LOW FIRE PURGE
4 4 D-8 LIMIT OPEN - HOLD
5 5 3-P AIR FLOW OPEN - HOLD
6 6 LINE FREQUENCY NOISE DETECTED
7 7 FLAME FAIL - PTFI
8 8 UNIT ADDRESS
9 9 M-D LIMIT OPEN - HOLD
10 A IGNITION TIMING
11 B MTFI
12 C FLAME SIGNAL - AUTO
13 D CYCLE COMPLETE
14 E L1-13 OPEN
15 F AC POWER FAIL (COEN)