Rivacold HI Error Code
High-temperature alarm — cabinet/room temperature above the alarm threshold
Source: Carel/commercial/0300099EN.pdf
What does Rivacold HI mean?
Rivacold monoblocks and condensing units ship with a Carel, Eliwell, or Dixell controller, and HI is that controller's high-temperature alarm. On the Carel controllers it is signalled by the buzzer and the code HI on the display when the temperature exceeds the high-temperature alarm threshold (AH) for longer than the alarm delay (Ad), and it resets automatically once the temperature falls back by the reset differential (A0). It is a warning that the box is too warm.
Symptoms
- Display shows HI (or a flashing high-temperature alarm) with the buzzer/relay active
- Cabinet temperature reading sits above the setpoint band
- Alarm clears automatically once the temperature falls back below the threshold minus the differential
Common causes
- Recent door openings, a large warm load, or a failed door heater/seal letting heat in
- Condenser fouling, a failed condenser fan, or restricted airflow reducing capacity
- Refrigerant undercharge or a system fault preventing pull-down
- Defrost running long or terminating late, or the alarm threshold/delay set too tight
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Diagnostic steps
Confirm it is a real over-temperature
Read the actual cabinet probe temperature on the controller. If it is genuinely above setpoint, work the refrigeration cause; if the box is cold, suspect the probe or the alarm parameters.
Rule out the easy causes
Check for a propped/leaking door, a recent load, and that defrost has finished. Let the unit attempt pull-down and watch whether the alarm clears on its own.
Check condenser and airflow
Clean a fouled condenser, confirm the condenser fan runs, and clear any airflow restriction — the most common cause of a unit that cannot hold temperature.
Verify the alarm parameters
Confirm the high-alarm threshold and delay match the application before chasing a fault — a threshold set too close to setpoint will nuisance-trip HI.
When to call a professional
If the condenser, fans, doors, and defrost are all good and the box still will not hold temperature, the unit likely has a refrigeration fault (undercharge, leak, restricted metering, or compressor capacity loss) — have a refrigeration technician check the charge and the system.
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Other Rivacold Error Codes
Low-temperature alarm — cabinet/room temperature below the alarm threshold
Temperature-probe fault — which probe E1 names depends on the fitted controller (probe 2/defrost on Carel easy; probe 1/S1 on other families)
Temperature-probe fault — which probe E2 names depends on the fitted controller (probe 3/condenser-product on Carel easy; probe 2/S2 on other families)
High discharge-pressure alarm — the controller stops the unit; manual or semi-automatic reset
Low suction/evaporation-pressure alarm — the unit stops when evaporation pressure falls below the threshold
Maximum temperature alarm on Dixell controllers — temperature above the high-alarm threshold (a temperature alarm, not a pressure trip)
Minimum temperature alarm on Dixell controllers — temperature below the low-alarm threshold
High temperature warning on Carel-controlled units — probe reading above the alarm threshold parameter
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