COPELAND 026-1739 Programmable Touchscreen Thermostat User Manual
5
Troubleshooting
In the unlikely occurrence of a problem with the thermostat, please try the following suggestions. Most problems can usually be
corrected promptly and easily.
Table 5-1 - Thermostat Troubleshooting
Problems
Suggestions
•
•
Make sure the operating conditions are within the specifications (temperature
range and humidity range).
Open the thermostat enclosure as per Section 2.3, Thermostat Installation and
wait 30 seconds prior to closing the enclosure.
Display is blank, corrupted or
shows “E01” or “- -“
•
•
Check the circuit breaker for 24VAC and reset if necessary.
Check the power switch at HVAC system and make sure it is ON.
Display shows “Lo”
Display shows “HI”
•
•
•
Check that the room temperature is not under 0°C or 32°F.
Check that the room temperature is not above 50°C or 122°F.
Set Thermostat Mode to HEAT, and make sure the HEAT temperature
setpoint is higher than the current room temperature.
•
•
Set Thermostat Mode to COOL, and make sure the COOL temperature
setpoint is lower than the current room temperature.
Open the thermostat enclosure as per Section 2.3, Thermostat Installation and
wait 30 seconds prior to closing the enclosure.
Heating or cooling system does
not respond
•
•
•
Check circuit breaker for 24VAC and reset if necessary.
Check the power switch at HVAC system and make sure it is ON.
Check that Rc terminal is properly connected to R terminal with shorting jumper
wire.
•
Open the thermostat enclosure as per
Section 2.3, Thermostat Installation and wait 30 seconds prior to closing the
enclosure.
•
•
•
•
•
Check circuit breaker for 24VAC and reset if necessary.
Modbus network does not
respond
Check the power switch at HVAC system and make sure it is ON.
Make sure that wirings are intact and properly connected to the terminal blocks.
Make sure that A- and B+ signal are properly connected and not inverted.
Check the configuration of DIP switches to match your network
(PU+, EOL and PD-).
If a problem is still present after the above suggestions, please contact Technical Support at 833-409-7505 or email
25
©2024 Copeland LP.
026-1739 R4 Programmable Touchscreen Thermostat
| General | Details |
|---|---|
| Name | COPELAND 026-1739 Programmable Touchscreen Thermostat User Manual |
| Make | Copeland |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.72 MB |
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