Honeywell RTH7400 Installation Manual page 29

In case of difficulty
Heating or
cooling system
does not respond
"Wait" appears
on the screen
Heat pump
issues cool air
in heat mode, or
warm air in cool
mode
• 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 respond.
• Compressor protection feature is engaged. Wait 5 minutes for the system
to restart safely, without damage to the compressor.
• Check Function 0190: Heat Pump Changeover Valve to make sure it is
properly configured for your system (see page 20).
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RTH7400/RTH7500
69-204ES—0