User's Manual

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TROUBLE SHOOTING TESTS (2-Pipe System)
Voltage: When using a voltmeter across “Black" and "Red", voltage
must be 24VAC.
To Check Continuity: (Using a Voltmeter with all loads connected)
Cold pipe or season switch set to cool: (power supplied through
yellow wire)
A) When the thermostat is calling for cooling and low fan, meter
should read 24VAC from “Black” to “Orange” and from “Black” to
“Green”. When cooling is deactivated, meter should read 0VAC
from “Black” to “Orange” and “Black” to “Green”.
B) When the thermostat is calling for cooling and medium fan,
meter should read 24VAC from “Black” to “Orange” and from
“Black” to “Blue”. When cooling is deactivated, meter should read
0VAC from ”Black” to “Orange” and “Black” to “Blue”.
C) When the thermostat is calling for cooling and high fan, meter
should read 24VAC from “Black” to “Orange” and from “Black” to
“Violet”. When cooling is deactivated, meter should read 0VAC
from ”Black” to “Orange” and “Black” to “Violet”.
Hot pipe or season switch set to heat: (power supplied through white
wire)
A) When the thermostat is calling for heating and low fan, meter
should read 24VAC from “Black” to “Orange” and from “Black” to
“Green”. When heating is deactivated, meter should read 0VAC
from ”Black” to “Orange” and “Black” to “Green”.
B) When the thermostat is calling for heating and medium fan,
meter should read 24VAC from “Black” to “Orange” and from
“Black” to “Blue”. When heating is deactivated, meter should read
0VAC from ”Black” to “Orange” and “White” to “Blue”.
C) When the thermostat is calling for heating and high fan, meter
should read 24VAC from “Black” to “Orange” and from “Black” to
“Violet”. When heating is deactivated, meter should read 0VAC
from ”Black” to “Orange” and “Black” to “Violet”.
+3V
SB1
SB2
COM
SEN3
SEN2
REF
+3V
SB1
SB2
COM
+3V
SB1
SB2
COM
Diagnostic Mode:
Press and hold the "up" and "down" buttons
together until "DIAG" appears on the display.
Diagnostic mode will alternately display
setpoint and room temperature every 8 seconds.
SETPOINT
AUTO
DIAG
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The current operating fan mode will also show.
Low speed fan will display a single fan icon,
two speed fan will display two fan icons and
three speed fan will display three fan icons.
ROOM
AUTO
DIAG
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4
Adjust setpoint as follows:
6.0°F or more ABOVE room temperature
3.0°F to 5.9°F ABOVE room temperature
0.4°F BELOW to 2.9°F ABOVE room temperature
1.9°F to 0.4°F BELOW room temperature
2.0°F BELOW room temperature (cool threshold)
Heating Season, Hot Pipe
FUNCTION CHART
MED
Lo Hi Med
Lo Med Med
Lo Med
Off Off Off
Off Off
HIGH
Hi
Hi
Hi
Off
Off Off
On
On
On
Off
Reset Set
LOW AUTO COOL HEAT
FAN SPEED SYSTEM
Lo
Adjust setpoint as follows:
2.0°F ABOVE room temperature, Hot Pipe
1.9°F ABOVE to 1.9°F BELOW room temperature
2.0°F BELOW room temperature
Heating or Cooling Not Currently Active
MED
Lo Lo Med
Off Off Off
Lo Med
HIGH
Hi
Off
Hi
Set
Off Off
Set
LOW AUTO COOL HEAT
FAN SPEED SYSTEM
Lo
Adjust setpoint as follows:
2.0°F ABOVE room temperature (heat threshold)
1.9°F to 0.4°F ABOVE room temperature
0.4°F ABOVE to 2.9°F BELOW room temperature
3.0°F down to 5.9°F BELOW room temperature
6.0°F or more BELOW room temperature
Cooling Season, Cold Pipe
MED
Off Off Off
Off Off Off
Lo Med
Lo Med Med
Lo Med
HIGH
Off
Off
Hi
Hi
Hi Hi
Set Reset
Off
On
On
On
LOW AUTO COOL HEAT
FAN SPEED SYSTEM
Lo
SETPOINT
ECON
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To deactivate the diagnostic mode, press the
"fan" button until the fan activity moves to
"ECON". "DIAG" will disappear from the display.
Press the "fan" button again to return to
operating mode.
Diagnostic mode can also be deactivated by
changing the °F/°C slide switch.
SEN3
SEN2
REF
+3V
SB1
SB2
COM
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