In most cases, the compatible heat pump notes a malfunction (a malfunc-
tion can lead to disturbance in comfort) and indicates this with alarms
and action instructions in the display.
If the operational interference is not shown in the display the following
tips can be used:
BASIC ACTIONS
Start by checking the following items:
• That the heat pump is operating and the supply cable to SAM 42 is
connected.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
LOW HOT WATER TEMPERATURE OR A LACK OF HOT
WATER
• The heat pump has temporarily prioritised supply air ventilation to
prevent too low temperatures in the supply air coil.
LOW OR A LACK OF VENTILATION
• Filter blocked.
– Change the filter.
• The ventilation is not adjusted.
– Order ventilation adjustment.
• Supply air device closed, blocked or throttled down too much.
– Check the supply air inlets.
• Check external frost protection (outdoor air damper).
13Chapter 3 | Disturbances in comfortNIBE SAM 42
3 Disturbances in comfort
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