Miscellaneous Issues - IBC EX Series Installation & Operating Manual

8.4.3 Miscellaneous issues

Issue
Fumes and High Humidity Improperly installed
Boiler stuck on Initialize
'Ghost' call for heat.
Error: Water High Limit /
Low Water Cutoff won't
clear.
DHW taking too long to
heat.
Boiler output not
modulating up to
maximum despite target
not being reached.
Primary Pump runs but
load pumps do not.
Miscellaneous issues
Diagnosis
condensate trap
Leak in vent piping
Flue gas leak within boiler Visually inspect all mechanical
Fan board failure
Triac or 'Power-robbing'
thermostat sending
current to boiler.
Boiler is in 1 hour safety
lockout.
Sensor may be under-
reading actual water
temp.
Possible flow issue:
check for 35 or 40 °F
temperature difference
between boiler supply and
return water temperatures
(evokes electronic fence).
Wiring not complete.
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8.4.3 Miscellaneous issues
Fix
Refer to installation/operation
instructions.
Inspect using soap solution.
connections.
Replace fan.
Remove Therm. connections from boiler
to confirm that stray voltage, or current
induced in thermostat wiring, is source of
nuisance signal. Replace the Power
Robbing thermostat, isolate the
thermostat with a relay or install a properly
sized resistor (consult the thermostat
manufacturer first then IBC for
instructions).
Reset safety device and cycle boiler
power off and on to reset error.
Check sensor engagement; note well is
15cm / almost 6 inches deep and sensor
must be fully set to back. Check
programmed settings boiler temp set too
close to the required DHW temperature.
Confirm that primary pump is able to
overcome head loss of boiler and primary
loop piping at the required flow rate.
Supply power to the PV/L and PV/N
terminals from the incoming power supply
to the boiler. (Factory wired on boilers with
a factory installed touchscreen controller)