Midea MV6-i252WV2GN1-E, Руководство по обслуживанию

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V6-i VRF 50/60Hz
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2.17 P2, H5: Suction pipe low pressure protection
Digital display output 2.17.1
Description 2.17.2

Suction pipe low pressure protection. If the system has a 3-phase protector and the 3-phase protector is connected to
the low pressure switch, the system will display P2 protection when initially powered on, and P2 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 2.17.3

Trigger condition:
For P2 protection: Suction pressure ≤ 0.05MPa.
For H5 protection: P2 protection appears three times in 60 minutes.

Recover condition: Suction pressure ≥ 0.15MPa.

Reset method:
For P2 protection: Resume automatically.
For H5 protection: Manually restart.
Possible causes 2.17.4

Outdoor unit stop valves are closed.

Insufficient refrigerant.

Low pressure side blockage.

Poor evaporator heat exchange.

Main PCB damaged.