Goodman Amana AMES80 U Series, Обслуживание и устранение неисправностей

Страница: 19 / 28

SERVICING
19
CHECKING AUXILIARY LIMIT CONTROL
BLOWER HOUSING
AUXILIARY LIMIT CONTROL
Auxiliary Limit Control Location
WARNING
HIGH VOLTAGE
D
I S CONNECT
ALL
POWE R BEFO R E S E R VICING O R
IN S TALLING THI S UNIT.
M
ULTIPLE POWE R S OU R CE S MAY
BE P R E S ENT.
F
AILU R E TO DO S O MAY CAU S E P R OPE R TY
DAMAGE, PE RS ONAL IN J U R Y O R DEATH.
RED
RESET
BUTTON
COLOR
IDENTIFYING

Testing Auxiliary Limit Control
WARNING
T
O AVOID PO SS IBLE FI R E, ONLY R E S ET THE AU X ILIA R Y LIMIT CONT R OL
ONCE.
I
F IT S HOULD OPEN A S ECOND TIME, A Q UALIFIED S E R VICE R
MU S T DETE R MINE WHY THE AU X ILIA R Y LIMIT OPENED BEFO R E
R E S ETTING AGAIN.
INDUCED DRAFT BLOWER MOTOR
WARNING
HIGH VOLTAGE
D
I S CONNECT
ALL
POWE R BEFO R E S E R VICING O R
IN S TALLING THI S UNIT.
M
ULTIPLE POWE R S OU R CE S MAY
BE P R E S ENT.
F
AILU R E TO DO S O MAY CAU S E P R OPE R TY
DAMAGE, PE RS ONAL IN J U R Y O R DEATH.
1. Remove burner compartment door to gain access to
the induced draft blower motor.
2. Disconnect the motor wire leads from its connection
point at the induced draft motor.
3. Using a ohmmeter, test for continuity between each of
the motor leads.
4. Touch one probe of the ohmmeter to the motor frame
(ground) and the other probe in turn to each lead.
If the windings do not test continuous or a reading is
obtained to ground, replace the motor.
5. If the windings have a continuity reading, reconnect
wires. Turn power on to the furnace and turn the
thermostat on in the heating mode. Check voltage for
115V at the induced draft motor terminals during the tri-
al for ignition. If you have 115V and the motor does not
run, replace the induced draft motor.
6. After completing check and/or replacement of induced
draft motor, reinstall burner compartment door.
7. Turn on electrical power and verify proper unit opera-
tion.
CHECKING GAS VALVE (Redundant)
A combination redundant operator type gas valve which
provides all manual and automatic control functions required
for gas fired heating equipment is used.
The valve provides control of main burner gas flow, pressure
regulation, and 100 percent safety shut-off.
WARNING
D
I S CONNECT
ALL
POWE R BEFO R E S E R VICING
Single stage gas valves should be tested on the furnance with
24 VAC connected to the gas valve and manometers reading
supply line and manifold pressures.