Page 74 MUL41E-0610/06-2011
ALARM 021, 022, 023, 024:
WATER EVAPORATOR, OUT OF RANGE
Description
The water evaporator temperature (Inlet or Outlet) measured by the probe is outside of the permitted range. This
operating range can vary according to the presence or not of glycol with the chilled water.
• Alarm 021: The outlet water temperature is higher than the safety limit setting (3274) in heating mode,
• Alarm 022: The outlet water temperature is lower than the safety limit setting (3271) in cooling mode,
• Alarm 023: The inlet water temperature is higher than the safety limit setting (3272) in cooling mode,
• Alarm 024: The inlet water temperature is lower than the safety limit setting (3273) in heating mode.
Action
Immediate shut down of the complete unit. The alarm is signalling 5 min after if the water evaporator temperature is
still out of the permitted range.
Reset
The alarm is automatically deleted once the temperature has reached the permitted operating range for 2min. After
a change over mode (cool / heat), these alarms are reset during 15min.
Possible cause(s)
• Temperature probe failed
• Problem with wiring of probe.
Remedies
• Replace probe
• Check the connections of the probe.
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