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16A - Heat exchanger freezing

Alarm conditions:

Įrenginys fiksuoja šilumokaičio užšąlimą, kai po keturių bandymų atsitirpinti išlieka užšąlimo sąlygos: One of the clauses are not fulfilled after 3 heat exchanger defrost tries.

  1. Heat exchanger efficiency is below critical value,
  2. Pressure between heat exchanger is higher than critical value.

Possible causes:

  1. Defrosting algorithm does not work,
  2. Temperature sensor failure,

Troubleshooting:

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