Home > Alarms > C5/C5.1 > 91A - 98A - Controller failure

91A - 98A - Controller failure

Alarm conditions:

91A - Too low 24V supply voltage in C5 main controller

92A - Too high 24V supply voltage in C5 main controller

93A - Supply fan C5_VM module failure

94A - Exhaust fan C5_VM module failure

95A - El. Heater C5_PM module failure

96A - Heat pump C5_PM module failure

97A - Zone1 C5_PM module failure

98A - Zone2 C5_PM module failure

Possible causes:

  1. Module failure,
  2. Main controller failure.

Troubleshooting:

 

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