Troubleshooting - Master TB116 Owner's Manual

WARNING: Never service heater while it is plugged in, connected
to propane supply, operating, or hot. Severe burns and electrical
shock can occur.
ObSERVED FAULT
Fan. does. not. turn. when.
switch(s).1.or.2.are.pressed.
to.ON
Heater.will.not.ignite
120193-01A

TroUBLeSHooTing

POSSIbLE CAUSE
1..No.electrical.power.to.heater
2..Thermostat.set.too.low
3..Ambient. temperature. is. too.
high.. Thermostat. is. satis-
fied
4..Defective.motor
1..User. did. not. follow. installa-
tion.or.operation.instructions.
properly
2..No. spark. at. ignitor.. To. test.
for.spark,.follow.step.5.under.
Replacing Ignitor,.page.15..If.
you.see.spark.at.ignitor,.have.
heater serviced by qualified
service. person.. If. no. spark.
seen:
. A). Loose. or. disconnected.
ignitor.wire
B) Wrong spark gap
C) Bad ignitor electrode
D) Bad spark DSI
3..Air.proving.switch.blocked
www.desatech.com
REMEDY
1..Check. voltage. to. electrical.
outlet.. If. voltage. is. good,.
check.heater.power.cord.for.
breaks
2..Adjust. thermostat. to. higher.
setting
3..Wait.for.ambient.temperature.
to.decrease
4..Replace.motor..See.Motor and
Blower Assembly,.page.13
1..Repeat. installation. and. op-
eration. instructions.. See.
Installation,. page. 10. and.
Operation,.page.11
2.
. A).Check.ignitor.wire..Tighten.
or.reattach.loose.ignitor.wire.
B) Assure gap between ignitor
electrode.and.burner.deck.is.
0.13"/0.15".(3.3/3.8.mm)..Do.
not.bend.electrode..Doing.so.
may.cause.it.to.break
. C). Replace. ignitor. elec-
trode.. See. Replacing Ig-
nitor,.page.15
. D). Replace. spark. trans-
former..See.Replacing DSI
Control,.page.15
3..Clean.tubing
17