SERVICING
56
2. COOLING EMERGENCY MODE
Cooling emergency mode is to be used when communica-
tion between the indoor and outdoor units is not functioning
properly and temporary cooling operation is required. This
mode enables the outdoor unit and indoor unit to run inde-
pendently of each other. There are two key steps to setup
Cooling Emergency Mode.
a.
switches S-13 and S-14 of Switch Bank DS-4 on the in-
door unit to select desired 25%, 50%, 75% or 100% air-
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.
Funcon Value SW13 SW14 SW15 SW16
25 OFF OFF - -
50 ON* OFF* - -
75 OFF ON ON* -
100 ON ON OFF -
Switch Bank DS-4
Indoor Fan Sengs
Fan Only
Speed %
as selected (even if the compressor has stopped). The in-
door 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.
DS2-1 DS2-2
ON ON Normal Opera�on
ON OFF
Emergency Mode
(Low Cool Level)
OFF ON
Emergency Mode
(Medium Cool Level)
OFF OFF
Emergency Mode
(High Cool Level)
Dip Switch Posi�on
Func�on
ON �me OFF �me
Avg.
Run Time
Low Cool
Level
7 minutes 15 minutes 30%
Medium
Cool Level
8 minutes 10 minutes 50%
High Cool
Level
15 minutes 6 minutes 70%
Note: This mode does not require a thermostat. Any thermo-
stat requests will be ignored while in emergency operation.
NOTE: Set indoor DS-4 (Indoor fan setting) and DS-6 (In-
door 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 temperature 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.
100%
50%
70F
95F
Compressor
Capacity
Ambient
temp
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