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NS SPLIT INSTALLATION MANUAL
DIP Switch Settings
DIP SWITCH
NUMBER
DESCRIPTION OFF POSITION ON POSITION
SW1 N/A NOT USED N/A N/A
SW2
1
Service/Test Mode - Allows control of “NORM” or “TEST” opera-
tional modes. Test mode accelerates most timing functions 16
times to allow faster troubleshooting. Test mode also allows view-
ing the “CURRENT” status of the fault inputs on the LED display.
Test Norm
2
Freeze Sensing Setting
Allows eld selection of freeze thermistor fault sensing tempera-
tures for well water (30°F) or antifreeze-protected (15°F) earth
loops.
Loop
(Protection 15° F)
Well
(Protection 30° F)
3
Accessory Relay
Allows eld selection of the accessory relay to operate with the
compressor or fan.
Fan Comp
4 NOT USED N/A N/A
5 NOT USED N/A N/A
6
Input Diagnostics - Allows viewing the inputs from the thermo-
stat to the control board such as Y1, Y2, O, G, W, SL1-In on the
LED display.
Diagnostic Inputs
viewed at LEDs
Normal Display
viewed at LEDs
7
Output Diagnostics - Allows viewing the outputs from the control
board such as the compressor, reversing valve, blower, hot water
pump, and loop pump on the LED display.
Diagnostic
Outputs viewed at
LEDs
Normal
Display viewed
at LEDs
8
Thermostat Selection
Congures the control for a pulsed lockout signal (ComforTalk and
FaultFlash thermostats) or continuous 5 VAC lockout signal.
Pulsed “L”
signal
Continuous “L”
signal
SW3
1 Single or Dual Capacity Operation Dual Cap 1 Speed
2
Zoned/Finish on Second Stage
This switch allows the unit to down stage with the thermostat
when off and nish with second stage when on. Finish on second
stage reduces stage changing in reciprocating dual capacity
compressors.
Normal -
All other systems
Finish on 2nd
Unzoned Dual
Capacity
E-Series or
Premier 2 speed
3 ECM Fan Monitoring - Set for No PRM on split systems No RPM RPM
4 NOT USED N/A N/A
5
On dual capacity units this switch allows stage change: on the y
when off, and 1 minute delay when on. A delay is required on all
reciprocating dual capacity units.
Envision
E-Series or
Premier