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Common Chiller Problems.
As an example please find below the commons alarm code faults on the Refcool V15 chiller Carel Controller and what associated action can be taken to fix/repair
Alarms screen and LEDs
Pressing the ALARM (Top left corner) key can occur in two different situations - no alarm or an alarm present.
This screen makes it possible to easily enter the alarms log using the ENTER key.
If there is at least one alarm, the alarms screen is displayed sorted by alarm code from lesser to greater.
Each alarm contains the information needed to understand the cause of the alarm.
The information available in the screen is shown below:
The red LED under the ALARM button can be:
It is important to scroll back and see all the alarms that have occurred from a single event.
Alarm AL165 Circuit 1 - Alarm freeze evaporating temperature.
Alarm Issue Unit - Circuit 1 - alarm freeze evapotaing temperature. Suction line probe (B5)
What it means The evaporating temperature is too low and there is a danger that the evaporator will freeze up.
Corrective Action Check coolant water flow and ensure unobstructed - clear filters and ensure all system valves are open, reset the alarm.
If problem persists Inform a qualified service engineer of the alarm and get them to attend site and diagnose issue.
Alarms screen and LEDs
Pressing the ALARM (Top left corner) key can occur in two different situations - no alarm or an alarm present.
This screen makes it possible to easily enter the alarms log using the ENTER key.
If there is at least one alarm, the alarms screen is displayed sorted by alarm code from lesser to greater.
Each alarm contains the information needed to understand the cause of the alarm.
The information available in the screen is shown below:
- Alarm number/total alarms;
- Unique alarm code;
- Alarm date and time;
- Long alarm description;
- Value of the probes linked to the alarm;
The red LED under the ALARM button can be:
- Off: no active alarm;
- Flashing: there is at least one active alarm and the display shows a screen that is not part of the alarms loop.
- On: there is at least one active alarm and a screen that is part of the alarms loop is displayed.
It is important to scroll back and see all the alarms that have occurred from a single event.
Alarm AL165 Circuit 1 - Alarm freeze evaporating temperature.
Alarm Issue Unit - Circuit 1 - alarm freeze evapotaing temperature. Suction line probe (B5)
What it means The evaporating temperature is too low and there is a danger that the evaporator will freeze up.
Corrective Action Check coolant water flow and ensure unobstructed - clear filters and ensure all system valves are open, reset the alarm.
If problem persists Inform a qualified service engineer of the alarm and get them to attend site and diagnose issue.
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