Maytag Amana MVS96 Series Installation Instructions Manual page 39

TROUBLESHOOTING CHART
Symptom
Furnace operates at reduced
performance or operates on
low stage when high stage is
expected
Furnace fails to operate
Furnace fails to operate
Furnace fails to operate
Furnace fails to operate
Furnace fails to Operate
LED Status Fault Description
E
Airflow is lower than demanded
Analog Pressure Sensor
Reference Error. APS reference
E1
is out of the range (5.0+/-0.2)V
for 5 seconds
Analog Pressure Sensor Null
E1
Error. Inconsistent Pressure
reading with inducer OFF
Analog Pressure Sensor Span
E1d Error. Inconsistent pressure
reading with inducer ON
Analog Pressure Error (Blocked
E1
Vent Error)
Analog Pressure Sensor, Input
E1f
Error
39
Corrective Actions
Check filters for blockage, clean filters or remove
obstruction
Check ductwork for blockage, remove
obstruction and verify all registers are fully open
Verify ductwork is appropriately sized for system,
resize and/or replace ductwork if necessary
Verify electrical connections to pressure sensor
Verify electrical connections to pressure sensor
Verify electrical connections to pressure sensor
Need to check the APS Sensor or its connection
if this error is occurred. The failure conditions
occur as per the following for 5 seconds:
1. The vent is blocked, and the pressure could not
reach (lower than)
the target pressure when inducer stayed at
maximum RPM which
stored in Shared Data.
2. The vent is blocked, and the pressure could not
reach (higher than)
the target pressure when inducer stays at the
minimum RPM
(Pressure Switch Min Limit).
3. APS fault causes the pressure fixed at a value
lower than the target
pressure when inducer stayed at maximum RPM
which stored in
Shared Data.
4. APS fault causes the pressure fixed at a value
higher than the target
pressure when inducer stayed at minimum RPM
(Pressure Switch
Min Limit).
Check the APS Sensor or its connection if this
error is occurred. APS input voltage is out of the
below ranges for 5 seconds.
1. If 2" is selected, the voltage range shall be from
(0.25-0.06)V to (4+0.06)V.
2. If 4" is selected, the voltage range shall be from
(0.5-0.06)V to (4.5+0.06)V.