Crown Boiler AWI162, TWI095, TWI128, TWI061, TWI162, AWI061, AWI195 AWI/TWI Troubleshooting Chart

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AWI/TWI Troubleshooting Chart

Caution: Read page 29 before attempting to use this chart

Thermostat calls for heat

*Pow er off

*Blow n fuse or tripped breaker

*Misw ired or loose electrical connection in 120V line

Remove t'stat or zone valve end sw itch w ires from T&TV terminals on L8148E. Install temporary jumper across terminals T and TV.

Circulator start?

N

N120 volts at L1&L2?

Y

120 volts at

C1&C2?

N

Y24 volts across T&TV?

N

Y	Vent	Y
	damper
	open?
		N

24 volts

			across B and R						Y
			(limit sw itch) in
				L8148E ?
		120 volts						*Boiler off on
Y				N			N	limit
		across
		terminals at						*Defective
		circulator?
								high limit.
		Y
							24 volts
							betw een pins
	*Seized or
					1&4 (blue&yellow )and
	defective
					2&4 (orange&yellow ) on
	circulator
					damper end of damper
										N
							harness? See
						Note 7 on page 29.

Does		N	*Defective
circulator			L8148E-see
run now ?
			Note 6 on page
			29.
	Y

*Loose connection in t'stat or zone valve end sw itch w iring

*Defective t'stat or zone valve end sw itch

*T'stat or zone system misw ired-consult t'stat or zone valve manufacturer's instructions

*Bad electrical connection betw een C1 or C2 and circulator

Y

*Obstruction in path of damper blade

*Defective damper motor

*Loose connection betw een damper harness and damper

*Loose connection betw een damper harness and L8148E

*Defective damper harness.

*Defective L8148E

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