Emerson 1HDEZ-1521 installation instructions Troubleshooting, Reset Operation

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TROUBLESHOOTING

Troubleshooting

Reset Operation

If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the system by performing a power reset.

Note: Be sure to record the user’s Main Menu settings.

When thermostat is reset, Main Menu and Programming will reset to factory settings. (Installer’s equipment setup options will NOT be affected by the reset.)

To reset the programming, clock and configuration settings, press and and the SYSTEM touch keys simultaneously and hold until the screen resets.

Symptom

Possible Cause

Correction Action

 

 

 

 

No Heat/No Cool/

1.

Blown fuse or tripped

Replace fuse or reset breaker.

No Fan

 

circuit breaker.

 

(common

2.

Power switch to OFF.

Turn switch to ON.

problems)

3.

Furnace blower

Replace door panel in proper

 

 

compartment door

position to engage safety

 

 

or panel loose or not

interlock or door switch.

 

 

properly installed.

Check connections at the

 

4.

Loose connection to

thermostat and equipment

 

 

system.

control. Thermostat base

 

 

 

should be installed on a

 

 

 

flat surface to ensure a

 

 

 

good connection with the

 

 

 

thermostat.

 

 

 

 

No Heat

1.

Pilot light not lit.

Re-light pilot.

 

2.

Furnace Lock-Out

Many furnaces have safety

 

 

Condition. Heat may

devices that shut down when

 

 

also be intermittent.

a lock-out condition occurs. If

 

3.

Heat pump system

the heat works intermittently

 

 

requires service.

contact the furnace

 

 

 

manufacturer.

 

 

 

 

28

 

 

 

Image 28
Contents Emerson Inspire Index Applications and Specifications Configuration Applications Maximum Options StagesInstallation Equipment Control Equipment Control Terminals Operation / Function HM2Wiring to Typical Connection of a Single Stage or Multi-Stage System Wiring Guide for Equipment Accessories Fan Thermostat Power System Thermostat and Equipment Control WiringAdvanced Installer Menu Items on the Advanced Installer Menu areCommunicating Devices Communicating DevicesEquipment Control Outdoor IndoorRev Valve HUM Found. Installation Failed Faults StatusUSB Upload Heat Pump Lockout outdoor sensor required Thermostat SummaryDual Fuel Setpoint outdoor sensor required Aux Lockout Temperature outdoor sensor required Humidity Display AdjustHeat Cycle Rate Cool Cycle RateInstallation Test Check System OperationClock and Display Settings Display SettingsMain Menu Navigating through your thermostat menusHeating Program Time and Day DisplayOutdoor Temp Display Humidity DisplayCooling Program Thermostat SettingsFactory Pre-Programmed Heating and Cooling Schedule Main Menu Main Menu Main Menu Main Menu Troubleshooting Reset OperationSymptom Possible Cause Correction Action No Cool Temperature Display AdjustTemperature Heat, Cool or FanNumber Displayed 7 Segment LED Equipment Control Fault CodesSystem Communication Codes Page Part no -7343B
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