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Pub. No. 22-5209-04
Keypad
Functions
MODE
- Pressing this key changes the system mode to Heat, Cool, Automatic or Off.
A border will appear around the mode on the display
to show the system mode you’ve selected.
Mode
Mode
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Pub. No. 22-5209-04
Table 2 Troubleshooting (Continued)
Symptom
Possible Cause
Action
Heating will not come on.
1. System Mode not set to Heat.
2. Minimum off time delay being enforced.
3. Loose connection to control or system.
4. Heating system requires service or control requires replacement.
1. Set Mode to heat and raise the setpoint above room temperature.
2. If heating does not come on within 5 minutes, Check Heating.
3. Check - Repair connections.
4. Repair system / Replace control.
Cooling will not come on.
1. System Mode not set to Cool.
2. Minimum off time delay being enforced
3. Loose connection to control or system.
4. Cooling system requires service or control requires replacement.
1. Set Mode to cool and lower the setpoint below room temperature.
2. If cooling does not come on within 15 minutes, contact servicer.
3. Repair connections.
4. Repair system / Replace control.
Cool ON or Heat ON is displayed,
but no warm or cool air is coming
from the registers.
1. The heating equipment turns on the fan when the furnace has
warmed up to a setpoint.
2. Heating or cooling equipment is not operating.
1. Wait one minute after Heat ON is displayed and then check the
registers.
2. Check Heating and Cooling system.
Control does not respond to keypad
presses.
1. “Keypad locked” is displayed on LCD.
2. Keypad failure.
1. Unlock keypad - press Up+Down arrow together until “Keypad
locked” appears.
2. Replace Control.
Fan does not operate properly in
heat or cool mode.
1. Incorrect wiring.
2. Heating or cooling equipment inoperative.
1. Correct wiring.
2. Repair system.
Fan runs all the time.
1. Fan mode set to ON.
2. Shorted control wiring.
1. Set fan mode to AUTO.
2. Check / Repair wiring.
Cooling cycle too fast or too slow.
(Narrow or wide temperature swing).
The location of the control and/or the size of the cooling system
may be influencing the cycle rate.
Verify cycle rate adjustment Step 20 & 22.
Heating cycle too fast or too slow.
(Narrow or wide temperature swing).
The location of the control and/or the size of the heating system
may be influencing the cycle rate
Verify cycle rate adjustment Step 24, 26, 28, 30 & 32
