Appendix SiUS39-506
136 General Information
7.10.2 Example 2: Mismatch between cables connecting indoor and outdoor
units and corresponding piping. (all model)
Situation The remote controller is not showing any malfunction and the system is operating but there is no
flow of warm air from the indoor unit (in heating mode).
Source of
Problem and
Remedial Action
The connecting cables and the corresponding piping were not correctly matched.
Recabling was carried out and the fault disappeared.
Main Points
Special care must be taken when the pipework and cabling are carried out by different people.
Run each indoor unit in turn to check that the system is correctly matched.
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