Refrigeration Fault Codes

A single temperature sensor in a Standard Circuit or Case Control Circuit is reading above the defined case temperature high setpoint.

A case circuit has entered clean mode, fans and compressor are deactivated for cleaning cycle.

The Echelon controller has reached its maximum number of bound NVs (network variables).

An analog value in an application using 'alternate' user setpoints has risen above its programmed Hi Limit setpoint.

An analog value in an application using 'alternate' user setpoints has fallen below its programmed Lo Limit setpoint.

An Air Handling Unit or Heat/Cool application has not achieved setpoint for a prolonged period.

An internal error has caused the loss of an entire application cell, priority 15 (high).

A user has changed the configuration of one of E2's applications, priority 99 (informational).

A user has changed a setpoint in one of E2's applications, priority 99.

An override switch on an ARTC/MultiFlex RTU has been ON for a prolonged period, suggesting possible switch failure, priority 20.

An ARTC/MultiFlex RTU lost power and reset when power was restored, priority 50.

The E2 attempted to write data to memory but the memory was full, priority 50.

Average log cannot be written because there is insufficient memory, priority 15.

The modem on this E2 is not functioning properly, priority 20.

Battery backed memory was lost not due to a cleanout operation, priority 30.

Battery runtime has exceeded 80% of the battery lifetime, priority 99.

A valid connection could not be made between an input and an output during network binding, priority 20.

An update to the E2's BIOS has failed, priority 20.

The E2 is unable to change the time on its hardware clock.

A defrost cycle did not terminate on temperature, terminated on backup time limit instead.

A scheduled defrost was skipped, typically due to the circuit being in another state.

The E2 controller lost power and has restarted. Logged on power-up to track outage events.

Communication on the Echelon LON network has failed or a node has gone offline.

Suction pressure has risen above the programmed high setpoint, indicating insufficient compression or excessive load.

Suction pressure has dropped below the programmed low setpoint, risking compressor damage from floodback or low pressure cutout.

Discharge pressure has exceeded the programmed high setpoint, risk of high pressure cutout on compressors.

A compressor's circuit breaker has tripped. Unit protection event.

Compressor internal overload protector or external OLP has opened, shutting down the compressor.

Oil differential pressure switch did not close within the startup time window, or opened during operation.

The high pressure safety switch (HPCO) has opened, shutting down the compressor. Requires manual reset.

The low pressure safety switch has opened. May auto-reset if LPCO is set for automatic reset.

A temperature probe input is reading an open circuit (>300k ohm) or short circuit (<10 ohm), indicating sensor or wiring failure.

A case door has been open longer than the programmed door alarm delay setpoint.

An I/O board or device on the E2 network has gone offline or stopped communicating.

Echelon controller reached its limit of bound NVs

Analog value using alternate setpoints rose above Hi Limit

Analog value using alternate setpoints fell below Lo Limit

Internal error caused loss of an entire application cell

A user changed the configuration of one of E2 applications

Override switch ON for prolonged period

RTU lost power and reset when power restored

Battery backed memory loss not due to cleanout

Battery runtime has exceeded 80% of battery lifetime

Valid connection could not be made between input and output

Update to E2 BIOS has failed

E2 unable to change time on hardware clock

Case temp sensor recording above defined case high setpoint

Case temp sensor recording below defined case temperature low setpoint

Checkit sensor returning an invalid temperature value

Checkit sensor on Suction Group recording high temperature