Olsen Airco HTL Series, Инструкция по установке, эксплуатации и обслуживанию

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240005126 Rev A 10/27/2005
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R7184 LED DIAGNOSTIC LIGHT
The LED diagnostic light has several functions. It
indicates the state or mode in which the oil burner
is operating. It will also indicate fault conditions,
and help determine cad cell resistance while the
burner is operating.
NORMAL CONDITIONS :
The LED diagnostic light will turn on when the
burner enters the carryover state; the point at
which ignition spark is on, and will remain on
through the run state, where the ignition spark is
terminated but the burner continues to fire.
The LED diagnostic light will turn off at the end of
the burner cycle as the R7184 enters the idle
state, and will remain off until the next heating
cycle.
FAULT CONDITIONS :
If the LED diagnostic light is flashing quickly; 1 Hz
(½ second on / ½ second off), the R7184 is in the
lockout state or in restricted mode. To exit the
lockout state, press the reset button.
If the LED diagnostic light is flashing slowly; ¼ Hz
(2 seconds on / 2 seconds off), the R7184 is in the
recycle state. This indicates that flame sensing
was lost after the lockout timer expired during the
ignition carryover state. The R7184 will return to
the idle state within 60 seconds.
CAD CELL CONDITION :
If the LED diagnostic light is off, the cad cell is not
sensing flame.
If the LED diagnostic light is on, the cad cell is
sensing flame, or viewing ambient light.
The resistance of the cad cell may be checked
while the R7184 is in the run state by pressing the
reset button. The LED diagnostic light will flash the
following code:
Table C-2: Cad Cell Resistance
Flashes Resistance in Ohms
1 Less than 400
2 Between 400 - 800
3 Between 800 – 1600
4 Between 1600 - 5000
Troubleshooting
IMPORTANT : Due to the potential hazard
of line voltage, only a trained, experienced
service technician should perform the
troubleshooting procedure.
PRELIMINARY STEPS :
Check the diagnostic light for indications of burner
condition. Refer to R7184 LED
DIAGNOSTIC LIGHT
section
for details.
WHEN SIMULATING A CALL FOR HEAT AT THE
R7184, DISCONNECT AT LEAST ONE
THERMOSTAT LEAD WIRE FROM THE T1 - T2
TERMINALS TO PREVENT DAMAGE TO THE
THERMOSTAT. NEGLECTING THIS PROCEDURE
MAY BURN OUT THE HEAT ANTICIPATOR OF A
STANDARD 24 VAC THERMOSTAT, OR CAUSE
HARM TO COMPONENTS WITHIN A MICRO-
ELECTRONIC THERMOSTAT.
Before checking the oil primary control, perform these
preliminary checks, (repair or replace controls as
necessary):
•
Check the power supply; fuse box or breaker, any
service switches, all wiring connections, and burner
motor reset button (if equipped).
•
Check the limit switches to ensure that the switch
contacts are closed.
•
Check the electrode gap and position.
•
Check the contacts between the oil primary control
and the electrodes.
•
Check oil supply (tank gauge).
•
Check the oil nozzle, oil filter, and oil valves.
•
Check the piping or tubing to the oil tank.
•
Check the oil pump pressure.
Check Oil Primary Control and Igniter
If the trouble does not appear to be in the burner or
ignition hardware, check the oil primary control and the
igniter by using the following equipment:
Insulated jumper wires with both ends stripped.
Screwdriver, Voltmeter (0 - 150
VAC
)
ELECTRICAL SHOCK HAZARD.
TROUBLESHOOTING IS DONE WITH THE
SYSTEM POWERED. BE CAREFUL TO OBSERVE
ALL NECESSARY PRECAUTIONS TO PREVENT
ELECTRICAL SHOCK OR EQUIPMENT DAMAGE.