51
Katherm HK
1.43
Ready-to-install trench heaters with EC tangential fan
Assembly and installation instructions
16. Troubleshooting
General:
Faults in the motor of a slave unit are not shown on the KaController. Only
a motor fault in a master unit is shown on the KaController.
16.1 A11 Control sensor faulty
The room temperature is regulated on the selected control sensor,
that is to say that the external room sensor/intake sensor can be
faulty, depending on the DIP switch setting. If the room sensor in the
KaController is faulty, this display alternates to tAL1.
Cause:
The RGB sensor, AI1 sensor or the virtual sensor measures a temperature
of ≥ 90°C or the input has short-circuited.
Effect of this alarm:
the fan is switched off and the valves close.
16.2 A12 Motor protection
The motor is continuously monitored and “A12” appears in the display of
the KaController if a motor fault is detected.
Cause:
see 5.10
Effect of this alarm:
The fan is switched off and the cooling valve is closed.
16.3 A13 Room frost protection function
The room temperature is monitored at each phase in the system to the
defined limit of 8 °C. The room frost protection function is enabled if the
room temperature drops below 8 °C. The room frost protection function is
disabled when the room temperature rises above the limit of 8.5°C.
Cause:
The RGB sensor, AI1 sensor or the virtual sensor measures a temperature
of ≤ 8°C.
Effect of this alarm:
The fan is switched on at stage 1 and the heating valve is opened.
The limit of 8 °C is fixed for the room frost protection function and
cannot be changed.
Summary of Contents for Katherm HK Series
Page 83: ......
