Replace pump.
Is the
pump able to run?
NO
Is their air
in the system?
YES
YES
YES
YES
YES
Rectify.
(R11T, R12T, R21T, R22T).
Open up automatic air purge in the unit.
A field installed air purges.
LWT or RWT is below 5°C and you want to heat up.
The unit is not working in his envelope.
Flow
switch works
properly.
NO
NO
Replace flowswitch.
Does the
unit do a decent
defrost? (large ice build
up on the coil)
NO
- The LWT temperature while in defrost gets too low.
- Check if there is enough load on the circuit (the unit never
runs 25 min in heating).
- Check refrigerant charge.
- Min water volume.
To Next Page
Loading...
