Honeywell RTH7400 series Quick Installation Guide

RTH7400/RTH7500 Series
25 69-2487EF—01
Troubleshooting
SETUP WIRING ASSISTANCE TROUBLESHOOTING
Heating or cool-
ing system does
not respond
Press SYSTEM to set system to Heat.
Make sure the temperature is set higher
than the Inside temperature.
Press 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.
Wait 5 minutes for the system to
“Wait” appears
on the screen
Compressor protection feature is
engaged. Wait 5 minutes for the system
to restart safely, without damage to the
compressor.
Heat pump is-
sues cool air in
heat mode, or
warm air in cool
mode
Check Function 0190: Heat Pump
Changeover Valve to make sure it is
properly congured for your system
(see page 17).

Honeywell RTH7400 series Specifications

General

Display Type	Digital
Programmable	Yes
Program Periods Per Day	4
Wi-Fi Connectivity	No
Programmability	7-Day
Voltage	24V
Backlight	Yes
Power Source	Battery
Battery	AA
Temperature Range	40°F - 90°F