IBC SL 35-199 Operating Instructions Manual page 59

5.3.5 Miscellaneous
SYMPTOM
FUMES AND HIGH HUMIDITY
BOILER STUCK ON
INITIALIZE
TOUCH SCREEN MESSAGE:
Unknown Error
BOILER REMAINS IN
STANDBY DURING CALL FOR
RESET HEATING OR SET-
POINT (DHW OPERATION
WORKS AS NORMAL). (5
BUTTON CONTROLLER)
'GHOST' CALL FOR HEAT.
ERROR: WATER HIGH LIMIT /
LOW WATER CUT-OFF 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.
PRIMARY PUMP RUNS
DURING PARALLEL-PIPED
DHW CALL.
TROUBLESHOOTING
SL 35-199, SL 45-260 MODULATING GAS BOILERS
DIAGNOSIS
Improperly installed
condensate trap
Leak in vent piping
Flue gas leak within boiler
Fan board failure
Temperature sensor input
problem.
Boiler may be in Warm
Weather Shut-down.
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 degree
F temperature difference
between boiler supply and
return water temperatures
(evokes electronic fence).
Wiring not complete.
Load definition as DHW.
REMEDY
Refer to installation/operation instructions
Inspect using soap solution
Visually inspect all mechanical connections
Replace fan.
Test each temperature sensor for appropriate
readings and Replace defective temperature
sensor.
In Installer Setup / Heat Load Configuration
/ Configure Load (Heating) adjust Summer
Shutdown Temperature to a temperature
above that registered by outdoor sensor.
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
temp
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 Touch Screen Controller)
Re-define DHW load as DHW Loop 2 (5
button Controls) to turn off primary pump
during domestic hot water calls. On Touch
Screen Controllers set the boiler pump to off
in the Installer Set-up Menu.
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