Amana GUSA User's Information Manual page 15

Troubleshooting / Before You Request a Service Call
Symptoms of Abnormal
Operation
- Furnace fails to operate.
and
- Integrated control module diagnostic
LED provides no signal.
- Furnace fails to operate.
and
- Integrated control module diagnostic
LED is lit continuously.
- Furnace is not operating
and
- Integrated control module diagnostic
LED is flashing one flash.
- Furnace fails to operate.
and
- Integrated control module diagnostic
LED is flashing two flashes.
- Induced draft blower runs continuously
with no further furnace operation.
and
- Integrated control module diagnostic
LED is flashing three flashes.
- Circulator blower runs continuously
with no further furnace operation.
and
- Integrated control module diagnostic
LED is flashing four flashes.
- Furnace fails to operate.
and
- Integrated control module diagnostic
LED is flashing six flashes.
- Normal furnace operation.
but
- Integrated control module diagnostic
LED is flashing seven flashes.
- Furnace is not operating.
and
- Integrated control module diagnostic
LED is flashing eight flashes.
- Furnace operating on low stage with
temperature of conditioned air lower than
typical.
and
- Integrated control module diagnostic
LED is flashing nine flashes.
- Induced draft and circulator blower run
continuously with no further
furnace operation.
and
- Integrated control module diagnostic
LED is flashing continuously.
1) LED flash code may be viewed through sight glass in blower compartment door.
2) LED flash code will cease if power to the control module is interrupted through the disconnect or furnace door switch.
3) Integrated control module will automatically attempt to reset from "lock out" (1 Flash) after one hour.
Associated
Probable Cause(s)
LED Code
(See Notes 1 & 2)
None - No electrical power to furnace.
ON
- Integrated control module has an
internal fault.
Continuous
On
- No gas supply to furnace.
1
1 Flash - Condensate drain blocked.
(See Note 3)
2
- Possible pressure switch malfunction.
2 Flashes
- Blocked flue and/or inlet air pipe.
1 3
- Blocked drain system.
3 Flashes
4
- Dirty filters or blocked return grilles.
4 Flashes
- Polarity of electrical power to furnace
or control module has been reversed.
6
6 Flashes
- Poor unit ground.
- Flame sensor is coated/oxidized.
7
- Flame sensor is incorrectly positioned
in burner flame
7 Flashes
8
- Possible igniter or integrated control
8 Flashes module problem.
9
- Blocked flue and/or inlet pipe.
9 Flashes
C
- Malfunction in flame sense circuit.
Continuous
Flashing
- Confirm that the external electrical disconnect switch is in the "ON" position.
If "OFF", switch to the "ON" position.
- Check for tripped or blown circuit breaker or fuse. Replace if necessary.
- Have servicer inspect furnace and replace faulty integrated control module if
necessary.
- Confirm that the external manual gas shut-off valve is in the "Open" position.
If "Closed", follow the start up procedure outlined in this manual when
moving the gas shut-off valve to the "Open" position.
- Check drain system for blockage
- Have servicer inspect furnace and make necessary corrections.
- Check flue and/or inlet air piping for blockage, especially at the outdoor
termination(s).
- Check drain system for blockage. Clear if possible
- Check filters. Repace or clean if necessary.
- Check for furniture, curtains, etc. blocking return grilles. Correct if
necessary.
- Have servicer inspect furnace and make necessary corrections.
- Have servicer inspect furnace and make necessary corrections.
- Have servicer inspect furnace and make necessary corrections.
- Check flue and/or air inlet piping for blockage, especially at the outdoor
termination(s).
- Have servicer inspect furnace and make necessary corrections.
15
Corrective Action