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OWNER/INSTALLATION MANUAL
5�2 PROTECTION CODES
These codes indicate machine stopping due to external
circumstances. These are not faults with the heat
pump.
Display
NO�
1
Er 03
No water flow through the heat pump.
Frost protection. The heat pump runs in heating mode
2
Er 04
for a short time when in standby mode to prevent
frost build up. This does not replace winterisation.
Ambient temperature is out of range, either lower
3
Er 21
than -5°C or higher than 43°C.
The temperature difference between inlet and outlet
4
Er 27
water is more than 10°C
24
Reason
Solution
Check water circuit and pool pump.
Heat pump will resume standby
once process is completed.
If outside, wait for ambient
conditions to improve (winterisation
may be required). If installed in
a sheltered place, check for air
recirculation.
Check water flow and pool pump.
1005759 ISSUE 5
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