Xp3: Compressor Current Protection; Combination Ratio - Midea V6-i Series Service Manual

2.18 xP3: Compressor current protection

2.18.1 Digital display output
'x' is a placeholder for the compressor system (compressor and related electrical components), with 1 representing
compressor system A and 2 representing compressor system B.
2.18.2 Description
 1P3 indicates current protection on compressor A; 2P3 indicates current protection on compressor B.
 All units stop running.
 Error code is only displayed on the unit with the error.
2.18.3 Trigger / recover condition
 Trigger condition: Current of compressor AA55PHDG –D1YG ≥ 24.6A or DC80PHDG –D1YG ≥ 33A.
 Recover condition: Current of compressor AA55PHDG –D1YG < 24.6A or DC80PHDG –D1YG < 33A.
 Reset method: Resume automatically.
2.18.4 Possible causes
 Outdoor unit stop valves are closed.
 Indoor load too large.
 Power supply abnormal.
 Sudden interruption of power to IDUs.
 Excess refrigerant.
 System contains air or nitrogen.
2.18.5 Procedure
ODU stop valves are closed
The indoor load is too large
The power supply is abnormal
Sudden interruption of power to IDUs
xP3
No
1
No
No
No
 Poor condenser heat exchange.
 High pressure side blockage.
 Inverter module damaged.
 Compressor damaged.
 Main PCB damaged.
Yes
Open the stop valves
Make sure the combination ratio is less
Yes
than 130%
Yes
Check the power supply equipment
Yes
Inspect the system and fix the error
Flowchart continued on next page ...
V6-i VRF 50/60Hz
113