Testing the
Thermostat Wiring
Testing the Power
If the thermostat display turns on,
this indicates that power is applied
correctly. In the event that the display
is permanently off, refer to the
following instructions:
1. Remove the thermostat front.
2. Use an electrical meter to measure
voltage between the R and C wiring
terminals. For AC power supplies, the
voltage should measure between 10
to 30 V (ac). For DC power supplies,
the voltage should measure between
10 to 30 V (dc).
3. If the voltage on the R and C wire
terminations is continuous and the
thermostat display is not on, the
thermostat may have a fault.
Contact your Uponor sales
representative for assistance.
If the thermostat display initially powers
on but later shuts off intermittently,
there may be a short circuit from the
W1, W2, Y or G wire to the power
common or ground, or the power
supply is too small to power the load.
Testing the First Stage
Heat Output Wiring
Press the Mode button and set
to Heat.
4. Press the
button and set the
heating temperature above the
current room temperature. Make
sure the display does not flash
“Max” if using a floor sensor.
5. When the “Heat On” symbol appears
on the display, use an electrical meter
to check for voltage on the W1 and
C wires connected to the zone valve,
wiring center, relay or switching relay.
The electrical meter should read
10 to 30 V (ac) or (dc).
6. If the W1 and C wires have voltage,
check the zone valve, wiring center,
relay or pump to determine if the
heat device is operating correctly.
Testing the Cooling
Output Wiring
Cooling is only available when the
switch setting is set to H/C/F.
1. Press the Mode button and set
to Cool.
2. Press the
button and set the
cooling temperature below the
current room temperature setting.
3. When the “Cool On” symbol appears
on the display, use an electrical
meter to check for voltage on
the Y and C wires on the cooling
equipment. The meter should
read 10 to 30 V (ac) or (dc).
Testing the Fan Output Wiring
The fan is only available when the
Fan Mode setting is not set to off.
4. Press both the
and
buttons together.
5. The display will show FAN MENU.
Press the PRGM button.
6. Press the up button to set the
cfan to On.
7. When the fan symbol appears on
the display, use an electrical meter
to check for voltage on the G and C
wires on the fan equipment.
The meter should read 10 to
30 V (ac) or (dc).
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