Blocked Flue Pressure Switch - Watts Aerco TAG-0072 GF-146-E Operation & Maintenance Manual

AM Series Boiler & Water Heater User Manual
CHAPTER 9 – OPERATION
ERR# DESCRIPTION
Reset button error
Err 87
Appliance selection
Err 93
error
Err 107
Internal software error
Err 108
Error happening to
Err 109
burners 2, 3 or 4
Flapper valve not
Err 110
open error
Flapper valve not
Err 111
closed error
Err 112
Internal software error
Err 113
Too low water flow
Err 114
Multiple burner
Err 115
master failure
Multiple burner
communication
Err 116
failure. (This error will
stop all modules.)
NO
CONN
Microprocessor in
lockout

9.21 Blocked Flue Pressure Switch

The AM Series units are equipped with a blocked flue pressure switch safety that shuts down
the unit when the flue exhaust vent pipe is blocked. If this pressure switch shuts off the unit (Loc
25), do not attempt to place the boiler in operation but rather, contact a qualified service agency
or technician able to reset the unit after checking for any potential dangerous situations.
OMM-0100_E • GF-146 • 11/15/2019
Blocking Error Messages
CHECKS
Too many reset button pushes
within 60 sec. period.
Check the list of 3000 parameters
(Appendix B).
-
When burner 1 (MASTER) goes in a
general error, it stops burners 2, 3
and 4 generating an "Err 109"
Check for any obstruction into the
a)
exhaust system.
Check if the fan is running.
b)
Check the flapper valve and its
c)
control sensor.
Check the flapper valve and its
control sensor.
-
Check water flow into the system
(parameter 1062), it must be higher
than parameter 3035.
-
a) Bus communication interrupted.
b) Burner is not working.
a) Check if water pressure sensor
wires are in short circuit.
b) Check if water flow meter wires
are in short circuit.
c) Check display wires are
connected to burner 1
(MASTER).
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
SOLUTIONS
Replace the power control board.
Resolve the error to burner 1 (MASTER)
Remove the obstruction from flue exhaust.
a)
Replace the fan or the power control board.
b)
Replace the flapper valve or its control sensor.
c)
Replace the flapper valve or its control sensor.
Replace the power control board.
Increase the water flow into the system.
Check for any obstructions in the water system
inlets.
Reset via 3013 parameter.
a) Check for bus communication.
b) Restore the burner that has its light off.
a) If not in short circuit try to replace the water
pressure sensor (or disconnect it via 3000
menu).
b) If not in short circuit try to replace the water
flow meter (or disconnect it via 3000 menu).
c) If not any of the above try to replace the power
control board or the display.
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