Waterco Electroheat PRO Guide D'utilisation page 31

Service Analyser Codes
Code Problem - Action / Remedy
FS, DEF, FS4 Problem: Normal defrost cycle. The fan blades are turning, but the
compressor has stopped. For Electroheat SubZero and Reversible
(XLR) model, the fan blades do not turn but the compressor runs.
Action / Remedy: Normal during defrost cycle.
Atmospheric conditions as well as the pool water temperature
should not be below the minimum operating temperatures, as stated
below, in order to obtain efficiency and avoid codes from appearing
on the electronic control temperature display. These codes are not
generally a problem with the pool heat pump at these conditions and
are not covered under warranty.
If temperatures are below the minimum temperatures the pool heat
pump should not be operated and must be switched off.
For Electroheat SubZero and Reversible (XLR) units, they will
automatically stop without human intervention.
For Electroheat SubZero model: If the unit carries out 5 consecutive
defrost cycles every 15 minutes or less, the pool heat pump is then
put into protection mode (FS4). During this mode, the fan blade
turns for 30 minutes in order to cool the evaporator. The pool heat
pump restarts automatically when the external temperature is 34 ˚F (1
˚C) and more.
For Reversible (XLR) Model: If the unit performs 4 consecutive cycles
(heating and defrost) within 1 hour, the unit goes into protection
mode and alternately displays the water temperature and the DEF
code. The fan motor runs for 30 minutes to cool the evaporator
and then stops. The compressor is always off. The unit restarts
automatically when the outside temperature is 43 °F (6 °C) and more.
If the code stays on permanently:
- Ensure the evaporator is clean. If not, switch the unit OFF from
- Ensure installation instructions have been followed. Improper
Model
Electroheat SubZero
Reversible (XLR)
All others
the circuit breaker (fuse) and use a garden hose to lightly clean
the evaporator. Allow it to dry before re-starting the pool heat
pump to avoid premature ice build up on the evaporator.
installation, e.g. no air circulation, could lead to the pool heat
pump continually going into defrost mode and the installation will
need to be corrected by the owner. This situation is not covered
by the warranty.
Atmospheric
conditions temperature
must be above must be above
32°F (0°C)
43°F (6°C)
52°F (11°C)
Pool Heat Pump I pg 30
Pool water
50°F (10°C)
65°F (18°C)
65°F (18°C)