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P13 Refrigerant circuit Error (W MULTI) *Please note that 3WAY models use a different
troubleshooting procedure.
Error detection method
• The indoor unit outputs this warning when it determines that a compressor inspection is required.
• The system stops and there is no automatic reset when this warning is output.
When there is no difference between compressor outlet and inlet pressure (≤0.2 MPa *) 3 minutes after the
engine was turned on, the engine stops and an error fl ag is set. An Cooling Circuit Fault is assumed when the
error fl ag has stopped the engine 5 consecutive times in 1 hour.
* This indicates that the difference in initial pressure and after 3 minutes is 0.2 Mpa or less.
Troubleshooting
1
1-1 Turn off the outdoor unit (be sure to do this before work)
Inspect the
Use the instructions in A25 Clutch Trouble to adjust the
compressor.
1-2
compressor lock. Does it lock? (Adjust both clutch 1 and 2.)
Use the instructions in P26 Clutch Connection Fault, to adjust
1-3
operation and wiring of clutch 1 and 2. Any problems?
2 Replace
Replace a compressor that is locked.
compressor
Measure the amount of chiller oil in the compressor when it
2-1
is removed. Fill the new compressor with an equal amount of
chiller oil (new oil) before attaching it to the outdoor unit.
3
Clean the
cooling
tubes.
Use our "Replacement material" as a guide to cleaning the
(Cleaning
3-1
system using liquids that are normally present in the system.
using liquid
normally
handled by
a device)
IV–90
Yes 2-1
No
1-3
Yes See section on page 26.
No
Keep under observation
Yes 3-1
No
Process completed
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Troubleshooting
