Amana AVZC18 Series Service Instructions Manual page 67

SERVICING
2. COOLING EMERGENCY MODE
Cooling emergency mode is to be used when communica-
tion between the indoor and outdoor units is not func-
tioning properly and temporary cooling operation is re-
quired. This mode enables the outdoor unit and indoor
unit to run independently of each other. There are two key
steps to setup Cooling Emergency Mode.
a) Select the appropriate airflow on the indoor unit
and enable emergency indoor airflow operation
(using Dip switches S-13 and S-14 of Switch Bank
DS-4 on the indoor unit to select desired 25%, 50%,
75% or 100% airflow. In addition, set switch bank
DS-6 dip switches S-21 to ON and S-22 to OFF
enabling emergency indoor fan).
b) Select the desired cooling level at the outdoor
unit (there are 3 levels available: Low Cool Level,
Medium Cool Level, High Cool Level selectable by
dip switch bank DS-2 on the outdoor unit). See
Dip Switch Position DS2-1 and DS2-2 Table for
cooling level selection.
Switch Bank DS-4
Indoor Fan Settings
Function Value
25
50
Fan Only
Speed %
75
100
During operation the indoor unit will provide constant air-
flow as selected (even if the compressor has stopped).
The indoor unit will continue to operate the electronic
expansion valve for refrigerant super heat control and the
compressor will cycle at the interval selected by dip switch
bank DS-2.
SW13 SW14 SW15
OFF OFF -
ON* OFF* -
OFF ON ON*
ON ON OFF
Low Cool
Level
Medium
Cool Level
High Cool
Level
Note: This mode does not require a thermostat. Any
thermostat requests will be ignored while in emergency
operation.
NOTE: Set indoor DS-4 (Indoor fan setting) and DS-6 (Indoor
emergency mode enable) before setting outdoor DS-2 dip
switch settings. Otherwise, the compressor may be dam-
aged in operation.
Note: When proper communication is established, these
switches must be returned to default settings
The compressor speed will automatically adjust based on
the outdoor ambient temperature. If ambient tempera-
ture is higher than 95 ° F, the outdoor unit can operate at
100% compressor speed. If ambient temperature is lower
than 70° F, the unit will run at 50% compressor speed.
Between 95 ° F and 70 ° F, the compressor speed will adjust
linearly as shown.
SW16
Compressor
Capacity
-
-
100%
-
-
50%
ON time OFF time
7 minutes 15 minutes
8 minutes 10 minutes
15 minutes 6 minutes
70F
95F
Avg.
Run Time
30%
50%
70%
Ambient
temp
67