34000 Autry Street, Livonia, MI 48150 | 800.968.5530 | Fax 734.419.0209 | www.hamiltonengineering.com | LIT91127US REV 5/2018
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C. SOFT LOCKOUT CODES
(TABLE 7-1) FMT 914 SOFT LOCKOUT CODES
DESCRIPTION
DISPLAY
CODE
WILL AUTOMATICALLY
RESET WHEN:
Low water cut off (if equipped) opened
A1
The water level is restored
Outlet temperature too high
A2
Outlet temp decreases sufficiently
Return temperature higher than setpoint
A3
The temp decreases sufficiently
Indirect DHW temperature too high
A4
DHW temp decreases sufficiently
Too many ON - OFF cycles
A5
After control keeps appliance off for two
minutes
Fan speed too high
A6
Fan speed is OK within 1 minute. If not,
it will become a Hard Lock Out
Fan speed too low
A7
Fan speed is OK within 1 minute. If not,
it will become a Hard Lock Out
Anti-scale setting exceeded (HWD models only)
A8
The temp is less than the setting
False flame signal
C1
No flame is measured
If the appliance is shut down for any reason other than the operating setpoint, a Soft Lockout Code is displayed in the
Temperature Display. If the Code is not flashing, the codes reference the above information.
Note: F2 will equal improper gas pressure on a CSD-1 equipped model.
D. HARD LOCKOUT CODES
(TABLE 7-2) FMT 914 HARD LOCKOUT CODES
DESCRIPTION
DISPLAY
CODE
ACTION TO RESET
Flame signal without flame
F0
Reset button
Additional safeties, X1 pins 2 & 11
F1
Reset safety then reset button
Burner door or back wall high limit
F2
Reset burner door high limit,
then reset button
Wrong fan speed indicated
F4
Reset button
No flame after 4 trials for ignition
F5
Reset button
Flame lost (4 times) during a burn cycle
F6
Reset button
Outlet sensor short/interrupted
E0
Reset button
Inlet sensor short/interrupted
E2
Reset button
Anti-scale setting exceeded 3 times during single burn cycle
E6
Reset button
Parameters programmed
PP
Reset button
Parameter programming error
PE
Reset button
FMT 914 burner controller is out of order
nc
Re-program / Disconnect power
Water flow switch, pressure switch, or the High Limit opened
H1
Reset button
No lag control is communicating in Cascade
nc.
(with dot) Restore RS-485 Wiring
If the appliance is shut down for any reason other than the operating setpoint and there is a Fault Code displayed
in the Temperature Display and the display
is flashing
a Code, the code references the above information.