Bosch 3H/2C Installation & Operation Manual page 20

2 0 | Bosch 3H/2C Touch-Technology Thermostat
8 Troubleshooting
Symptom
No display
System fan does not come on properly
No response with fi rst button press
Program schedule activates at wrong time
Thermostat turns on/off too frequently
Thermostat does not follow program
Fan runs continuously
Room temperature is not correct
LOCK displays when any button is pressed
Heat or Cool not coming on
displays
Setpoints do not display all of the time
OVERRIDE displays
Table 4
Data subject to change
Check for 24 VAC at thermostat; display is blank when 24 VAC is not present. Time and day of week must be reset after
power loss with no batteries installed.
Verify wiring is correct, check heat source (Gas/Electric) in Confi guration (see Section 5).
Press to activate touch icons.
Check time (AM/PM) set on thermostat (see Setting the Time and Date).
Adjust temperature diff erential (see Confi guration Mode Setting, Section 5.8).
Verify the schedule is on : check time (AM/PM); check if in program override.
Press and set to auto . is continuous run.
Calibrate thermostat (see Confi guration Mode Setting).
Thermostat has the button lockout function activated (see Lockout & Unlock Feature) and (see Confi guration Mode
Setting, Section 5.8).
Verify wiring is correct, gently pull on each wire to verify there is a good connection at terminal block.
Check for low battery condition or faulty outdoor/remote temperature sensor.
MENU
Press , , six times,
VIEW
Program schedule is in temporary override, it will return to schedule at the next transition time.
Installation, Operation & Application Manual
Solution
08.2016 | Bosch Thermotechnology Corp.