93Modul-AIR Exhaust Air Heat Pump Installation Guide
Error Messages
The Modul-AIR heat pump will display a warning icon on
the display if there is something wrong with the system that
requires attention. There are two types of warning icons,
both are detailed in this section.
The first type of warning icon looks like this. This icon is
informing you that the Modul-AIR heat pump is continuing
to operate but that it may be running less efficiently then
would be expected normally.
If you press the icon, you will see one of the following
screens:
Warning Screen Error Code Error Meaning Possible Solution
10
Water Pressure low, < 0.8
bar
Increase water pressure
20
Filter reached end of
lifespan
Replace the Air Filter
80*
No temperature difference
across the condenser
Check the circulating
pump operation, possible
air in the system.
81*
No temperature difference
across the evaporator
Check the fan operation,
possible blockage in the
duct system.
AP2**
The average central
heating temperature is
higher than 60°C.
Action is not necessary.
The device will reboot
within 35 minutes.
AP3**
The freeze protection is
active.
AP4**
Pause mode - the
compressor must not be
started yet.
* - Temporary blocking of the Heat Pump. The Heat Pump automatically restart aer 1 hour
** - These are informational notifications and may occur under normal operating conditions.
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