Panasonic U-4LE1E5, Service Manual, Page: 125 / 133

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5
Mini VRF SYSTEM
Trouble Diagnosis
3. Mini VRF System Alarm Codes
P16 Overcurrent of Inverter Compressor
Check of content 2.
Meaning of Alarm 1.
Secondary current effective value detected the overcurrent (trip current value).
Single-phase model : Trip current = 24.0 A
Single-phase model : xx A = 45.0 A
3-phase model : Trip current = 18.0 A
3-phase model : xx A = 36.0 A
Secondary current instantly detected over xx A.
•
•
0-1
-
Yes
No
0 Multiple
factors
7-1
0-2
1 Power
Source
2 Board
wiring
3
Compressor
wiring
1-1
Correct the wiring
1-2
Yes
No
Power cord connections are loose.
Replaced the board, but it occurred again immediately.
-
Yes
No
Replace compressor
along with adding oil,
then recheck from 1-1
1-2
Test the power supply
1-3
Yes
No
Test the power supply
1-4
Yes
No
1-3 Extreme fluctuations in voltage.
Test the power supply
2-1
Yes
No
1-4 An open phase state is observed.
Replaced the compressor (added oil, if it was necessary)
but it occurred again immediately.
Rated power voltage is not 10%.
2-1
Correct
2-2
Yes
No
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections on the CR board and/or in the
connections of components that are connected by wiring from
the CR board.
2-2
Correct
2-3
Yes
No
Correct
2-4
Yes
No
2-3
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of outdoor board(s) that are
connected by wiring from the HIC board.
Correct
2-5
Yes
No
2-4
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of HIC boards connected by
wiring from the CR board.
Correct
2-6
Yes
No
2-5
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of HIC board(s) that are
connected by wiring from the outdoor board.
Correct
3-1
Yes
No
2-6
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of HIC board(s) that are
connected by wiring to a compressor.
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of outdoor board(s) that are
connected by wiring from the CR board.
3-1
Correct
3-2
Yes
No
Disconnections and/or miswiring are observed in the
connecting location of the compressor terminals.
3-2
Eliminate looseness by
changing the terminals,
or crimping the
terminals again.
4-1
Yes
No
Conditions such as burned terminal covers and/or discolored
terminals are observed in the connecting location of the
compressor terminals.
SM830195-01̲Mini VRF SYS.indb 45 SM830195-01̲Mini VRF SYS.indb 45 2011/12/20 16:32:59 2011/12/20 16:32:59