Refrigeration System - Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document

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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?
Maintenance Document 1589-3
Hydraulic unit
No
electronic circuit
sending data to
outdoor unit ?
Yes
No
Compressor
running ?
Yes
No
Operating pressure
OK ?
Yes
No
4-way valve
switching ?
Yes
No
Expansion correct ?
expansion valve
Yes
Inspect refrigeration
lines (clogging)
Hydraulic unit electronic system faulty
Inspect PCB
Charge to balance
Problem solved?
No
Valve coil faulty ?
Change
No
Change 4-way valve
after testing
Yes
Servicing complete
Yes
Change coil
41

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This manual is also suitable for:

Waterstage ws a100dd6 seriesWaterstage wg a050dd6 seriesWaterstage wg a100dd6 seriesWaterstage wo a060ldc seriesWaterstage wo a080ldc seriesWaterstage wo a100ldt series

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