Service Manual

8.4.2.15 The cooling operation or heating operation does not operate.
Supposed causes
● 4-way valve faulty
Check of 4-way, please refer to part 5 in 9.5 Trouble Criterion Of Main Parts.
8.4.2.16 When cooling, heat exchanger of non-operating indoor unit frosts.
When heating, non-operating indoor unit get warm.
Supposed causes
● EXV faulty
● Wire and tubing connected in reverse.
Check of EXV, please refer to part 6 in 9.5 Trouble Criterion Of Main Parts.
Notice: If you replace outdoor main PCB of KSIM30912-H216 (2nd gen), you need to check whether
the PCB is produced before Apr. 2013. If yes, you need to short connect OLP connector., Otherwise,
the outdoor LED will show “P0”.