Rev 1.4 Page
10 of 14
Troubleshooting
Condition Possible
Cause
LCD display is blank
Check EPA wiring. Refer to EPA-60 install guide.
Is power applied to EPA-60? Refer to EPA install
guide
Check NT20e base plate wiring.
LCD display is active but no
network link indication.
Check NT20e base plate wiring.
Check EPA-60 wiring.
Is EPA-60 patched to a switch or router?
HVAC heat does not activate
when tested
Verify you increased the heat set point higher than
the temperature reading and the NT20e is in heat
mode.
Check NT20e wiring.
Verify the HVAC system is powered.
HVAC cool does not activate
when tested
Verify you decreased the cool set point lower than
the temperature reading and the NT20e is in cool
mode.
Check NT20e wiring.
Verify the HVAC system is powered.
HVAC fan does not activate
when tested
Check NT20e wiring.
Verify the HVAC system is powered.
