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Pub. No. 22-5209-04
UP / DOWN Arrow
- Use these keys to raise or lower the Heat or Cool Setting.
- The first key press turns on the back lighting and a border around the setting to be ad
-
justed without changing the setting.
- Pressing the Up or Down arrow again will raise or
lower the setting that has the border around it.
- If you press and hold the Up or Down arrow, the temperature setting will advance rap-
idly.
- When the control is set to Auto mode, pressing the Mode key once changes the position
of the border to heat or cool.
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Pub. No. 22-5209-04
Trouble
-shooting
Table 2
Troubleshooting
Symptom
Possible Cause
Action
Display will not come on.
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Replace fuse or reset breaker.
2. Turn switch to ON.
3. Replace door panel in proper position to engage safety interlock or
door switch.
Indoor temperature display is incor-
rect.
Temperature display needs calibration.
Calibrate Sensor - User Setup Step 59.
Outdoor temperature display is
incorrect.
Temperature display needs calibration.
1. Calibrate Sensor - User Setup Step 60.
2. Disconnect outdoor sensor from controls terminal block and check the
sensor and field wiring reisitance value - Table 2.
Outdoor temperature display shows
“--” and Service indicator on solid.
Outdoor temperature sensor open or shorted
Outdoor sensor field wiring open or shorted
1. Replace outdoor sensor.
2. Check / repair outdoor sensor field wiring.
Cannot set Heating setpoint above
80 degrees
Deadband between Heating and Cooling set
too high
Decrease Deadband setting - User Setup Step 52.
Service indicator Flashing on and off. Control EEPROM write error.
Press any key and Check / Re-enter Setup Choices.
Service indicator solid on and “--” in
temperature display.
Onboard indoor temperature sensor open
or shorted
Replace Control
Room & Service icon flashing
Remote indoor temperature sensor open or
shorted
1. Check / repair remote indoor sensor field wiring.
2. Replace remote indoor sensor
Temperature setting will not change.
(Example: Cannot set heating higher
or cooling lower).
1. Upper and/or lower temperature limits
were reached.
2. “Keypad locked” is displayed on LCD.
1. Check the temperature setpoints:
Heating limits are 40 - 85F.
Cooling limits are 65 - 90F.
2. Unlock keypad - press Up+Down arrow together until icon disappears.
Room temperature overshoots when
Energy Savings Key ($) is used or
the Heat/Cool settings is changed
more than 2 degrees.
Oversized heating or cooling equipment.
Control can not respond fast enough to
prevent overshooting.
Set Control Response Rate to “Fast” - Step 34.
