Honeywell 1-Heat/1-Cool - TH5110D1022 Large R Operating Instructions Manual page 22

If . . .
"Cool On" is
not shown in
the display.
"Heat On" is
flashing in
the display
(heat pumps
only).
"Cool On" is
flashing in
the display.
Troubleshooting Tips (Cont)
Set System setting to Cool and set the
temperature setting below the room
temperature. If "Cool On" is shown solidly
in the display, but the cooling system does
not turn on, see "Cooling system does not
turn on" in Troubleshooting Tips.
Compressor minimum-off timer is active.
Wait up to five minutes for the heating
system to turn on.
Compressor minimum-off timer is active.
Wait up to five minutes for the cooling
system to turn on.
Then . . .
22 69-1713