Troubleshooting - Emerson 810-1600 Installation And Operation 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.
Problems
Display is blank, corrupted or
shows "E01" or "- -"
Display shows "Lo"
Display shows "HI"
Heating or cooling system
does not respond
Modbus network does not 
respond
Table 5-1 - Thermostat Troubleshooting
If a problem is still present after the above suggestions, please contact Emerson
Electronics and Solutions Technical Support 770-425-2724 or email 
SolutionsTechSup@Emerson.com.
Device and COM Port Setup in Site Supervisor
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.
> Check the circuit breaker for 24VAC and reset if necessary.
> Check the power switch at HVAC system and make sure its ON.
> 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.
> 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.
> 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-).
Troubleshooting • 41