1
1
5
5
TROUBLESHOOTING TIPS
SYMPTOM
ACTION TO TAKE
1.
Check power to the thermostat
2.
Check wiring diagrams
Thermostat Dead
3.
Check thermostat temperature sensor
Thermostat will not operate with a damaged temperature sensor
SYMPTOM
ACTION TO TAKE
1.
Check for break in G, W, or Y wire
2.
Allow minimum off time to pass
3.
Check system options for correct settings
Fan, Heat, Or Cool
Inoperative
4.
Remote system is overriding thermostat
"REMOTE"
is displayed when system is overriding thermostat. Disconnect the cable from
"COMM" connector to test
SYMPTOM
ACTION TO TAKE
1.
Mode is Off (Select Heat, Cool, or Auto)
Can't Adjust Temperature
2.
Check if thermostat keys are disabled
To enable thermostat keys for test, remove jumper
SYMPTOM
ACTION TO TAKE
1. Check COMM connector and wiring
2. Check thermostat address setting
3.
Check communications mode setting
Control By Remote System
Not Working
4. Check setup of the remote system
Ensure that all setup items for the thermostat and the remote system are set to the proper
configurations for communication
SYMPTOM
ACTION TO TAKE
1.
Allow 30 minutes for thermostat to adjust to room
temperature
2.
Adjust calibration offset
Temperature Reading
Incorrect
3.
Change setup option to display
o
F or
o
C
After installation, allow the thermostat up to 30 minutes for an accurate temperature reading
SYMPTOM
ACTION TO TAKE
Display Problem
1.
Disconnect power to the thermostat. Reconnect, then
observe display self-test
For a 5 second period after power is reconnected, all segments of the display should light indicating
all thermostat functions
Summary of Contents for OMNISTAT RC-122
Page 5: ...5 5 Figure 5...
