Amana AMH8 Operations Instructions download pdf (Page 54)

SERVICING

WARNING

HIGH VOLTAGE

ISCONNECT ALL POWER BEFORE SERVICING OR

INSTALLING THIS UNIT.

MULTIPLE POWER SOURCES MAY

BE PRESENT.

FAILURE TO DO SO MAY CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH.

VOLT / OHM

METER

COLOR

IDENTIFYING

TAB

Testing Auxiliary Limit Control

WARNING

O AVOID POSSIBLE FIRE, ONLY RESET THE AUXILIARY LIMIT CONTROL

ONCE.

F IT SHOULD OPEN A SECOND TIME, A QUALIFIED SERVICER

MUST DETERMINE WHY THE AUXILIARY LIMIT OPENED BEFORE

RESETTING AGAIN.

S-302 CHECKING FLAME ROLLOUT CONTROL

A temperature activated manual reset control is mounted to

the manifold assembly on 80% furnaces,

ROLLOUT

SWITCH

Flame Rollout Switch Location

(80% Upflow Furnace Shown, Downflow Similar)

The control is designed to open should a flame roll out

occur. An over firing condition or flame impingement on

the heat shield may also cause the control to open. If the

rollout control opens, the air circulation blower will run con-

tinuously.

On single-stage 80% and 90% models, the ignition control

diagnostic light will flash (6) six times indicating a trip of the

rollout switch.

INE VOLTAGE NOW PRESENT

WARNING

1. Remove the burner compartment door to gain access

to the rollout switch(es) mounted to burner bracket.

The servicer should reset the ignition control by opening

and closing the thermostat circuit. Then look for the ignitor

glowing which indicates there is power to the ignition con-

trol. Measure the voltage between each side of the rollout

control and ground while the ignition control tries to power

the gas valve.

2. Measure the voltage between each side of the rollout

control and ground during the ignition attempt. Refer to

the following figure.

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Amana AMH8 Operations Instructions Page 54

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