Sierra Products EasyFire EF 3801, Руководство по ремонту

Страница: 16 / 30

16
Basic tools required for troubleshooting - Multi Volt/Ohm Meter, standard and phillips screw drivers, standard jewelers
screw driver (fan speed adjustm ents on m ain control board).
No power - Power is provided by both AC and DC supplies. There are two replaceable fuses located near the power
connections. They are identified as Main (1 am p) and Ignitor (5 am p). If AC power is present to the m ain control system a
LED will be lit on the OFF button. If DC power is present a GREEN LED will be lit on the control panel.
Quick Testing -
1) Check AC power with volt m eter at wall socket - 115VAC.
2) Check DC power at battery - 12VDC.
3) Rem ove fuses and check continuity with OHM m eter. Blown fuses can be cause by voltage spikes (lightning,
power com pany). If fuse is found blown, replace only once and retest. If the fuse blows again further
troubleshooting is required before further fuse replacem ent.
Start up:
No fuel - Fuel located in the hopper is feed by a auger from the hopper bottom up to the shoot which directs the pellets into
the burn pot. The feed m otor is controlled by the m ain control system and on m odels EF3801B, 5001B, and 5001U-B a
hopper safety switch (EF4001-B auger can not be accessed from the hopper door). The switch will disable the feed system
if the hopper lid is open. The switch is located on the upper right hopper vertical panel and is accessed through a sm all
panel. Fuels is only feed in Low to High operating m odes and requires “prim ing” auger. If hopper is out of fuel, cycle from
OFF to LOW several tim es to allow pellets to feed into burn pot.
Quick Testing -
1) Confirm hopper lid is sitting on the switch arm and the arm is closing. W ith hopper lid open, push the switch arm down
and listen for click noting switch closure. W ith heater cold, and lid open, push switch arm down, push Low and the feed
m otor should start to turn.
2) Confirm feed m otor is not jam m ed by em ptying hopper and verifying a foreign object has not be caught. Rem ove top
cover from feed tube from inside hopper if there is any question. If the feed m otor is m echanically jam m ed, the control
system has a built in circuit breaker. The breaker will require a reset by cycling from OFF to LOW . Do not recycle m ore
than three tim es so the circuit does not becom e dam aged by overheating.
3) Pellets Jam m ed in feed shoot (above burn pot). Rem ove all jam m ed pellets and clean shoot with scraper.
Ignitor does not heat up - The ignitor has a separate 120VAC circuit which includes a fuse, relay, and ignitor. This circuit is
activated by the m ain control board via a 12VDC wire harness lead. W hen the m ain control call for start the 12VDC circuit
is closed sending 12VDC to the relay. As the relay closes, the 120VAC circuit is com pleted and the ignitor begins to heat.
As noted in prior section, if 120VAC power is not available the heater will still start the fan and feed if 12VDC is connected
allowing a m anual start with starter and m atch light.
Quick Testing -
1) Inoperative ignitor m ost likely have a blown fuse. Rem ove the 5 am p ignitor fuse and test with O HM m eter.
Replace if blown. As noted before if fuse blows again then further testing is required.
2) Testing ignitor requires access to the relay located near the m ain board assem bly. Access is through the lower
right pedestal for the 3801/5001, junction box on the 4001 insert, and lower right cabinet for the 5001U. Rem ove
the power to the unit. Unplug the ignitor lead from the relay and the neutral circuit. Using the OHM m eter check for
continuity between the two leads. If the circuit is open the ignitor has failed. If the circuit is com plete check one
lead and then ground the other lead to the ignitor base. If circuit is com plete ignitor has failed. A grounded circuit
will cause the fuse to blow.
3) If ignitor check out, rem ove the harness leads to the relay and using the volt m eter set to 20VDC, confirm 12VDC
when the power is reapplied a run button is pushed. If 12VDC is found then the relay has failed.
Heater starts then burns out - The start up is controlled by the control system and best results are from a cold start. If a
warm heater is im m ediately restarted it m ay not be able to confirm the required tem perature increase as the heater
tem perature is already warm and the tem perature is actually falling during the initial start up. Allow the heater to cool and
shut down before restarting.
Trim settings - W ill not change the first portion of the start up however will effect the initial run m ode. If the trim is fully
counter clockwise (Lowest) the heater m ay run low on fuel, m ost likely if the operating conditions are warm . High or Max