E8 Controller Fault Codes - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 7: Troubleshooting

7.1.1 E8 Controller Fault Codes

The table below lists the fault codes and fault descriptions associated with the E8 Controller.
TABLE 7-2: E8 Controller Fault Codes
CODE DESCRIPTION
PCB Element Fault
E 1 Intervention of the
high limit thermostat
(TL).
E 2 Insufficient gas
pressure.
E 4 No flame detected
during the ignition
phase.
E 5 Loss of flame signal
during boiler
operation.
E 6 Over high water
temperature detected
by the heating sensor
(SR) (>203°F).
E 10 Internal failure of the
local control PCB
(BMM).
E 11 Flame signal detected
before the ignition
cycle.
E 12 Local flow sensor
failure SR1 first
module.
E 14 Failure of the heating
return sensor (SRR).
E 15 Difference between
the global return
heating temperature
global sensor and the
heating flow sensor
greater than (>) 86 °F
(rp +10).
OMM-0095_0H
GF-139
EFFECT
Boiler shuts off.
Boiler will not run.
Boiler will not remain
lit after 3 attempts.
Boiler fails after
establishing flame
Boiler shuts off.
Module shuts off.
Boiler will not
attempt ignition.
Module will not run.
Module will not run.
Boiler shuts off and
pump turns on at max
speed.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
CORRECTION
Check for any obstructions
in the piping. Ensure
sufficient flow.
Check gas supply to the
unit and ensure minimum
3.5" w.c. at high fire
Watch ignition through
viewport. Ensure correct
120V wiring to the unit.
Clean or replace flame rod.
Ensure sufficient gas
pressure and flow during
high fire operation and
with any other connected
gas equpiment running.
Check and clean flame rod.
Check for any obstructions
in the piping. Ensure
sufficient flow.
Shut off power to the
boiler. Check fuse on
BMM. Replace BMM if
necessary.
Allow flame rod to cool.
Possibly replace flame rod.
Check with multimeter and
replace if necessary.
Check with multimeter and
replace if necessary.
Check for any obstructions
in the piping. Ensure
sufficient flow.
RESET
MANUAL - Pushbutton
under cap, located to the
left of the E8 controller.
AUTOMATIC
MANUAL - Clear fault and
retry ignition.
AUTOMATIC - Clear fault
and retry ignition.
AUTOMATIC - After
temperature falls.
AUTOMATIC - After turning
power on to the unit.
MANUAL - Clear fault and
retry ignition.
AUTOMATIC
AUTOMATIC
AUTOMATIC - When ΔT <
protection temperature
Page 111 of 144
09/15/2017