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Diagnostics
(for qualified service personnel only)
Failure, Cause, Correction
j Are all controls operating properly
(i.e. thermostats, low water
cut-off, etc.)?
j Are all wire connections tight and
secure?
Failure
Heating system does not activate
(GREEN power LED is not
illuminated)
Burner does not activate, or
activates intermittently
(RED fault LED flashes)
Burner does not activate
*1
Red LED does not flash when Honeywell S8600 ignition control module is used with boiler.
Cause
Power switch " " is in " "
position
Main power to boiler control and
heating system has not been
activated
Fuse on Vitotronic boiler control
has deactivated heating system
Burner is not electrically connected
Fixed high limit (FHL) tripped
No fuel
*1
Control calls for heat but burner
does not respond
*1
Control calls for heat but burner
does not respond
Other accessory defect
Correction
Ensure power switch " " is in " " position.
Activate main power; ensure 120 VAC is
supplied to control (receptacle).
Replace fuse in control with same type and
rating
(F1: T 6.3 A / 250 V, slow blow).
Ensure 7-pole
41
plug-in connection
to burner and/or power venter is
made.
Reset FHL by pushing in the pin, labelled with a
"
" (using a ballpoint pen).
If a "click" can be heard, the limit was tripped.
with oil: Ensure sufficient supply of oil
with gas: Open main gas supply valve
or
contact your local gas utility
Attempt to reset burner using reset
button on the burner
(underneath burner hood).
Service burner if necessary.
Refer to troubleshooting section in
burner manual.
Power venter has to have separate
120 VAC power supply to motor (see
power venter instructions).
Refer to troubleshooting section in
power venter manual. Air proving
switch, blower wheel or timer/relay
inside power vent may be defective.
Ensure proper operation of all accessories;
replace if necessary.
Refer to technical literature supplied with
accessories.
Troubleshooting
17
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