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Sierra Products, Inc. 5061 Brooks St. Ste. B, Montclair, CA 91763
P/N 140804 10/07
2 2
ELECTRICAL TROUBLE SHOOTING
WARNING: Only a trained technician should attempt to
repair a pellet heater electrical system.
Note: All tests should be accomplished with the unit
thermostat by-passed.
Remove both AC and DC power from unit. The igniter
system is protected with a 5 amp fuse located on the back
or side of the heater (Figure 1). The igniter is switched “Off”
and “On” by the control system via a relay located in the
lower right pedestal in front of the control board
(EF3801/5001) or in lower left rear of the unit accessed
from the back (EF4001). Wiring on all igniter systems are
the same. The following test steps will require a multi-meter
with AC/DC volt and ohm functions:
a. Unplug heater from wall outlet and 12VDC power!
b. Remove 5 amp fuse holder cap and fuse by pressing
in and turning counter clockwise. Test fuse with ohm
meter to confirm is not “open”. If fuse is open go to
Testing Igniter “d”. If fuse is good continue.
c. Check 115VAC power wire connection to relay and
neutral wire connection to igniter terminal. This can
be accomplished with the ohm meter. If wire is
disconnected or open replace.
d. Disconnect igniter leads from relay and neutral. Test
continuity with ohm meter between leads. If open
igniter is defective. If continuity exists then check for
internal grounding by checking each lead to the
shielded conduit of the igniter leads. If continuity
exists to ground then igniter is defective. If meter
reads open on both leads to ground then igniter
should produce heat when properly connected to
115VAC.
e. With igniter disconnected from relay, attach volt
meter (set meter to 200VAC) leads to relay 115VAC
out terminal and igniter neutral. Reapply 115VAC
power. Press operating button low. Relay should
immediately engage applying 115VAC to meter. If
meter has 115VAC then replace igniter as it should
be activated. If no AC power outputted from relay.
Continue to next test.
f. Disconnect DC control wires from harness to relay.
Attach volt meter (set meter to 20VDC) leads to
harness terminals. Reapply 115VAC power. Press
operating button low. Control system should
immediately engage applying 12VDC to meter. If
meter has 12VDC then replace relay as it should be
activated. If relay does not engage, exchange control
board and/or main switch board.
REPLACEMENT PARTS:
ITEM
NO.
PART
NO.
DE S CR IPTION
1 120120 12VDC RELAY
2 120117 CARTRIDGE HEATER
3 120118 AUTOLITE CONTROL SWITCH
4a 202163 BURN POT SCREEN 5001
4b 202164 BURN POT SCREEN 3801/4001
5a 300501 BURN POT 5001-AUTOLITE
5b 300500 BURN POT 3801/4001-AUTOLITE
6 110510 5 AMP FUSE MDL5 (NOT SHOWN)
Customer Service & Replacement Parts
Replacement parts are available from your local dealer or
on-line @ www.sierraproductsinc.net . or call or write:
Customer Service
Sierra Products, Inc.
5061 Brooks St. Ste. B,
Montclair, CA 91763
Phone 1-909-399-3355
Fax 1-909-399-3357
www.sierraproductsinc.net