Panasonic U-4LE1E5 Service Manual page 133

3. Mini VRF System Alarm Codes 4. Mini VRF System Alarm Codes
P16 Overcurrent of Inverter Compressor
1. Meaning of Alarm
• Secondary current effective value detected the overcurrent (trip current value).
Single-phase model : Trip current = 24.0 A
Secondary current instantly detected over xx A.
•
Single-phase model : xx A = 45.0 A
2. Check of content
0 Multiple
0-1
factors
0-2
1 Power
1-1
Source
1-2
1-3 Extreme fluctuations in voltage.
1-4 An open phase state is observed.
2 Board
wiring
2-1
5
2-2
2-3
2-4
2-5
2-6
3
3-1
Compressor
wiring
3-2
Replaced the compressor (added oil, if it was necessary)
but it occurred again immediately.
Replaced the board, but it occurred again immediately.
Power cord connections are loose.
Rated power voltage is not within ±10%.
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.
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.
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.
Disconnected parts, miswiring and/or poor connections (loose)
are observed in the connections of HIC boards connected by
wiring from the CR board.
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.
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.
Disconnections and/or miswiring are observed in the
connecting location of the compressor terminals.
Conditions such as burned terminal covers and/or discolored
terminals are observed in the connecting location of the
compressor terminals.
3-phase model : Trip current = 18.0 A
3-phase model : xx A = 36.0 A
5 - 45 5 - 46
Mini VRF SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
Yes 7-1
No -
Replace compressor
along with adding oil,
Yes
then recheck from 1-1
No -
Correct the wiring
Yes
No 1-2
Yes Test the power supply
No
1-3
Yes Test the power supply
No
1-4
Yes Test the power supply
No 2-1
Yes Correct
No 2-2
Yes Correct
No 2-3
Yes Correct
No 2-4
Yes Correct
No 2-5
Yes Correct
No 2-6
Yes Correct
No 3-1
Yes Correct
No 3-2
Eliminate looseness by
changing the terminals,
Yes
or crimping the
terminals again.
No 4-1
5