Comfort Alert

Descriptions

Cause

E2 Advisory

 

 

 

 

Open Circuit

Compressor open circuit.

• Outdoor unit power disconnect is open.

Compressor open circuit

 

 

• Compressor circuit breaker or fuse(s) is

 

 

 

open.

 

 

 

• Compressor contactor has failed open.

 

 

 

• High pressure switch is open and requires

 

 

 

manual reset.

 

 

 

• Open circuit in compressor supply wiring or

 

 

 

connections.

 

 

 

• Unusually long compressor protector reset

 

 

 

time due to extreme ambient temperature.

 

 

 

• Compressor windings are damaged.

 

 

 

 

 

Open Start CircuitCompressor current only in run

• Run capacitor has failed

Compressor open start circuit

 

circuit.

• Open circuit in compressor start wiring or

 

 

 

 

 

 

connections.

 

 

 

• Compressor start winding is damaged.

 

 

 

 

Open Run Circuit Compressor current only in start

• Open circuit in compressor run wiring or

Compressor open run circuit

 

circuit.

connections.

 

 

 

• Compressor run winding is damaged.

 

 

 

 

Welded ContactorCompressor always runs.

• Compressor contactor has failed closed

Welded Contactor

 

 

• Thermostat demand signal is not connected

 

 

 

to module.

 

 

 

 

 

Low Voltage

Control circuit < 17VAC.

• Control circuit transformer is overloaded

Compressor Low Volt Trip

 

 

• Low line voltage (contact utility if voltage at

 

 

 

disconnect is low)

 

 

 

 

 

Protector Trip

Thermostat demand signal Y is

• Compressor protector is open.

Protector Trip

 

present, but the compressor is not

• Outdoor unit power disconnect is open.

 

 

running.

 

 

• Compressor circuit breaker or fuse(s) is

 

 

 

 

 

 

open.

 

 

 

• Broken wire or connector is not making con-

 

 

 

tact.

 

 

 

• High pressure switch open if present in sys-

 

 

 

tem.

 

 

 

• Compressor contactor has failed open.

 

 

 

 

 

Table 6-6-Comfort Alert Outputs

 

 

The Comfort Alert diagnostic alarms are configurable in the E2 as Disabled, Failure, Alarm, or Notice with an accompanying priority setting. All Comfort Alert codes will share the same advisory type and priority parameters.

High/Low Occ/Unocc Space Temperature Alarms

The thermostat does not provide alarming information on either high or low temperatures for the Space tempera- ture sensor. Therefore, the E2 application will provide this functionality.

Supply Sensor Fail Alarm

The thermostat does not provide alarm information on

a failure of the supply temperature probe (if installed). The E2 application will provide this functionality. Advisory type, priority, and delay is provided for the supply sensor fail advisory.

Conditions for Return to Normal (RTN) on Diag- nostic Codes

The E2 application will issue an RTN on an active advisory when the corresponding bit of the diagnostic code goes to zero. If multiple diagnostic advisories are active simultaneously, they will all return to normal when the code reads zero.

6-10 E2 RX/BX/CX I&O Manual

026-1610 Rev 13 14-SEP-2011

Page 70
Image 70
Emerson E2 operation manual High/Low Occ/Unocc Space Temperature Alarms, Supply Sensor Fail Alarm