33-00066EFS—05
21
Installer options
Installer options require a password and
should only be changed by a qualified
technician.
To prevent unintended changes or
damage to your equipment,
do not
change these options yourself
.
MCR33976
Installer Options
MCR33977
Enter password
0
0 0 0
MCR34100
Troubleshooting
If you have difficulty with your thermostat, try these suggestions. Most problems can
be corrected quickly and easily.
Screen is blank
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.
Screen is
difficult to read
• Change screen brightness using Preferences menu (see page 15).
Red light is on
• If thermostat is in Emergency Heat mode, the red light is normal. It shows that the
thermostat is in Emergency Heat mode.
• If thermostat is not in Emergency Heat mode, an alert is active. Check message on
the thermostat screen.
Heating or
cooling system
does not
respond
• Touch
SYSTEM
to set system to Heat. Make sure the temperature is set higher than
the Inside temperature.
• Touch
SYSTEM
to set system to Cool. Make sure the temperature is set
lower than the Inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the
system to restart safely, without damaging the compressor.
Electrical
ratings
Terminal
Voltage (50/60 Hz)
Max. Current Rating
W - OB
18 to 30 VAC and 750 mVDC
1.00A
Y (cooling)
18 to 30 VAC
1.00A
G (fan)
18 to 30 VAC
0.50A
W2 - Aux (heating)
18 to 30 VAC
0.60A
Y2 (cooling)
18 to 30 VAC
0.60A
A-L/A (output)
18 to 30 VAC
1.00A
U1/U1
30 VAC max.
0.50A
Summary of Contents for VisionPRO 8000 Smart TH8321WF1001
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