Watts Aerco TAG-0072 GF-146-E Operation & Maintenance Manual page 118

AM Series Boiler & Water Heater User Manual
CHAPTER 9 – OPERATION
LOC# DESCRIPTION
Gas valve not
supplied before
ignition attempt
(When this error
Loc 2
happens to burner 1
(MASTER), it stops
all other burners)
Gas valve lost cable
connection during
Loc 3
fire
Loc 4 Gas valve relay not
closing
Gas valve circuit
(When this error
happens to burner 1
Loc 5
(MASTER), it stops
all other burners)
Safety relay open
Loc 6
error
Safety relay closed
Loc 7
error
Blocking error over
Loc 11
20 hr.
Loc 12 Fan error
Loc
Internal software error
13 to
24
Gas valve circuit
(When this error
happens to burner 1
Loc 25
(MASTER), it stops
all other burners)
Loc 26 Internal software error
Loc
Flame present with closed gas valve
27 to
28
Interlock input
(When this error
Loc
happens to burner
29
1 (MASTER) stops
all other burners)
OMM-0100_E • GF-146 • 11/15/2019
Lockout Error Messages
CHECKS
a) - Check High limit temperature switch
b) - Check High limit flue temperature fuse
a) Check the integrity of the wires
connections between gas valve and control
board.
a) Check the integrity of the wires
connections between gas valve and control
board.
a) Check High limit temperature switch
b) Check High limit flue temperature fuse
Press RESET button to see the Blocking
error reference and proceed follow it.
a) Check for 120VAC power connection of
the fan
b) Check PWM connection of the fan
a) Check High limit temperature switch.
b) Check High limit flue temperature fuse.
a - Check LWCO connection
b - Check flue blocked pressure switch
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
SOLUTIONS
WARNING!
If the high temperature fuse is
blown, before it is replaced it is mandatory to
inform the manufacturer to prevent serious
damage and a possible dangerous condition.
Failure to comply with this requirement can
result in excessive levels of carbon monoxide,
which can result in severe personal injury or
death!
a) If wires are interrupted, replace the wires.
b) If wires are ok try to replace the gas valve or the power
control board.
a) If wires are interrupted, replace the wires.
b) If wires are ok try to replace the gas valve or the power
control board.
WARNING!
If the high temperature fuse is
blown, before it is replaced it is mandatory
to inform the manufacturer to prevent serious
damage and a possible dangerous condition.
Failure to comply with this requirement can
result in excessive levels of carbon
monoxide, which can result in severe
personal injury or death!
Replace the power control board
Replace the power control board
a) If no 120Vac is present replace the power control board
b) If no PWM signal, replace power control board
c) Try to replace the fan
Replace the power control board
WARNING!
If the high temperature fuse is
blown before it is replaced, it is mandatory to
inform the manufacturer to prevent serious
damage and a possible dangerous condition.
Failure to comply with this requirement can
result in excessive levels of carbon monoxide,
which can result in severe personal injury or
death!
Replace the power control board
Replace the gas valve
a - If LWCO intervenes, try to reset it
b - Check if flue gas line is free from any blockage
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