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2-WAY MULTISET VRF SYSTEM
Trouble Diagnosis
7
1.
2WAY VRF DCI
Alarm Codes
P05 Alarm
Alarm code
P05
Alarm meaning
Reverse phase (or missing phase) detected
Alarm conditions
This alarm occurs when a reverse phase or missing phase is detected in the L1-L2-L3-N phases.
Probable cause
Reverse phase or missing phase in the L1-L2-L3-N phases
Check
Check the wiring at the power terminal plate.
Correction
Switch the phases and reinsert. Check if the result is OK.
Example
Notes
P16 Alarm
Alarm code
P16
Alarm meaning
Compressor 1 (INV) overcurrent alarm
Alarm conditions
This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency
of less than 80 Hz after start (when trouble judgment current is detected 13.5 A or higher in the
primary or secondary current).
Probable cause
There is a strong possibility of a compressor failure.
An alarm occurs for current detection trouble when it is judged that no current is flowing after start
(DCCT is damaged). In this case, the cause is a DCCT failure. The cause may be the effects of
noise in some cases.
Check
Check the power wiring and connector wiring.
Correction
It is possible to resolve this trouble by limiting the maximum frequency.
Example
Notes
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