Midea MV6-i252WV2GN1-E, Руководство по обслуживанию

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V6-i VRF 50/60Hz
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2.16 P1: Discharge pipe high pressure protection
Digital display output 2.16.1
Description 2.16.2

Discharge pipe high pressure protection. If the system has a 3-phase protector and the 3-phase protector is connected
with the high pressure switch, the system will display P1 protection when initially powered on, and P1 protection will
disappear once the system reaches a steady state.

All units stop running.

Error code is only displayed on the unit with the error.
Trigger / recover condition 2.16.3

Trigger condition: Discharge pressure ≥ 4.4MPa.

Recover condition: Discharge pressure ≤ 3.2MPa.

Reset method: Resume automatically.
Possible causes 2.16.4

Outdoor unit stop valves are closed.

Pressure sensor/switch not connected properly or has malfunctioned.

Excess refrigerant.

System contains air or nitrogen.

High pressure side blockage.

Poor condenser heat exchange.

Main PCB damaged.
Procedure 2.16.5
P1
ODU stop valves are closed
Yes
Open the stop valves
No
High pressure sensor connection on main
PCB is loose
1
Yes
Ensure the sensor is connected properly
No
High pressure sensor has short-circuited
or failed
2
Yes
Replace the sensor
No
Flowchart continued on next page …