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No power to control panel. Green “Normal Flashing”
LED should be blinking, if not apply power to
24VAC inputs of control panel. Check fuse.
Single transformer system. Install jumper between RC
and RH at HVAC Equipment outputs of control panel.
Interlock switch on furnace is open – close access doors.
Thermostat is not calling for heat. Check voltage at
the thermostat W input on the control panel.
Zone 2 calling while open or short at DAS inputs is
causing control panel to respond only to Zone 1.
Thermostat is power robbing or mechanical. Only use
line powered electronic thermostat with a C terminal.
Single transformer system. Install jumper between RC
and RH at HVAC equipment outputs of control panel.
Thermostat is not calling for cooling. Check voltage
at the thermostat Y input on the control panel.
Thermostat could be invoking a timed off delay.
Zone 2 calling while open or short at DAS inputs is
causing control panel to respond only to Zone 1.
Zone panel could be invoking a timed off delay.
Thermostat is power robbing or mechanical. Only use
line powered electronic thermostat with a C terminal.
Check if G is energized at the zone panel.
Check if G is energized at the thermostat.
Check if G is energized at the air handler.
Nothing comes on.
Heat will not come on.
Cooling will not come on.
Fan will not come on.
Troubleshooting (continued)
DETECTING HEATING, COOLING AND FAN PROBLEMS
Symptom Possible Solution
System requires the Discharge Air sensor. If DAS is not
installed, only Zone 1 calls will be recognized and dampers
will not operate. Disconnect power to the control panel,
install the DAS and restore power to the control panel.
ELECT/GAS jumper set to ELECT – change setting
to GAS.
HVAC system has built in duct purge. Set PURGE/NO
PURGE jumper on control panel to NO PURGE.
Discharge air temperature exceeds set limit.
Allow discharge air to cool 10° below set limit and
allow timed off delay to expire.
Discharge air temperature dropped below set limit.
Allow discharge air to warm 10° above set limit and
allow timed off delay to expire.
Dampers do not position on a call for heating,
cooling or fan. Heat, cooling or fan will not come on
when the Zone 2 thermostat is calling.
Fan immediately comes on with heat call.
After a cool call, the fan stops then starts right
away only to stop a short while later.
An open or short in the DAS sensor has been detected.
Install or repair the sensor.
Both the Y and W LEDs are blinking.
Fan is running but no heat, and W LED is blinking.
Fan is running but no cooling, and Y LED is blinking.