Amana AVXC20 Series Service Instructions Manual page 52

SERVICING
INDOOR UNIT TROUBLESHOOTING
Seven Segment
LED
Green CFM LED
A A S
UXILIARY LARM WITCH
The control is equipped with two Auxiliary Alarm terminals,
labeled CAS, which are typically utilized in series with a con-
densate switch but could also be used with compatible CO
sensors or fire alarms.
CAS
This feature can be activated or deactivated through the ther-
mostat user menus. The auxiliary alarm switch must be nor-
mally closed and open when the alarm occurs. For example, a
normally closed condensate switch will open when the base
pan's water level reaches a particular level. The control will
respond by turning off the blower motor and outdoor unit
and displaying the proper fault codes. If the switch is later
detected closed for 30 seconds, normal operation resumes
52
2
C W2 W1
ST1
3
ST4
Dip Switches
Communicating Board
SWITCH
24VAC
TH
and the error message is removed. The error will be main-
tained in the equipment's fault history. See FIGURE 15 on the
following page for the connection location.
C B
IRCULATOR LOWER
2
This air handler is equipped with a variable speed circulator
blower. This blower provides several automatically-adjusted
blower speeds. The Specification Sheet applicable to your
model provides an airflow table, showing the relationship
between airflow (CFM) and external static pressure (E.S.P.).
The electric heat dip switch default position is set to the OFF,
OFF, OFF position (21kW or 25kW) and should be adjusted by
the installer to match the installation requirements for the
correct electric heating CFM.
Using the Electric Heat Airflow table below, set dip switches 9,
10, and 11 for the installed heater kit. Verify selected CFM by
counting the green CFM LED blinks. The green CFM LED blinks
once for each 100 CFM of airflow.
If an electric heater kit has not been installed, set dip switches
9, 10, and 11 to any appropriate heater kit setting (see Table
10 for valid settings).
TR
Auxiliary
COM
Alarms
ST3
FUSE
3A
CAS
DE
HUM
O
Y2
Y1
W2
W1
G
C
R
2
1
C
2
1
R
ST2