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Split system single phase type
3 1 3 Refrigeration System
Unit produces no heat
The unit remains in continuous scanning mode
Initial checks:
Check the settings
Are the data sent by the user interface received by the heat pump?
Refrigeration System
Maintenance document "1792 - EN"
Hydraulic unit
No
electronic circuit
sending data to
outdoor unit ?
Yes
No
Compressor
running ?
Yes
Operating pressure
OK ?
Yes
No
4-way valve
switching ?
Yes
No
Expansion correct ?
Yes
expansion valve
Inspect refrigeration
lines (clogging)
Hydraulic unit electronic system faulty
Inspect PCB
No
Charge to balance
Problem solved?
No
Valve coil faulty ?
Change
No
Change 4-way valve
after testing
Yes
Servicing complete
Yes
Change coil
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