Specifications

MONITOR HEATING SYSTEMS
Section 6: Troubleshooting
INDICATION OF FAILURE MODE
Digital Display
EDI
cnc
L U J
cnc
/_/_//_/
EDB
C O
L U
E H
C 1C
L IJ
C 1C
/_ IU
The Reason of Indication
At pre-purge, Flame rod is sensing flame
when there should be none.
After power is turned on, power supply to
the microprocessor timing circuit is
incorrect.
At starting of operation, the circuit to drive
photo triac of Solenoid Pump is
malfunctioning.
Revolutions per minute of Combustion
blower is malfunctioning.
No ignition.
Rame failure.
Power supply voltage too low.
Load failure of Combustion blower motor.
Trouble Point
Flame sensing circuit, grounded flame
rod or pinched wire.
Timer clock circuit bad or power cycles
(hertz) to unit above or below acceptable
levels.
Solenoid Pump control circuit has a
malfunction.
Combustion blower or Combustion blower
control circuit has a malfunction.
Failure of Igniter, Solenoid Pump or
circuit Board.
Incorrect wiring or flame rod touches to
burner parts.
Air pressure switch or overheat open.
There are obstacles at circulation air inlet
or outlet.
Fan cage is clogged with dust.
Inadequate fuel supply.
Voltage too low or Power detector circuit
has a malfunction.
Flue Pipe is restricting airflow.
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