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:
- Module failure,
- Main controller failure.
Troubleshooting:
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