Midea MGA-D10/N1, Руководство пользователя

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MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz
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P2: Low pressure protection
LED indicates P2
Low pressure protection.
The wiring between the low pressure switch and
main control board is connected well or correctly.
Whether the low pressure switch is broken.
Connect it well.
Yes
No
Validate: Short connect the low pressure switch
socket, check whether the system can run normally.
Check whether the refrigerant system is ok.
Check whether the outdoor ambient temperature is
too low.
No
The refrigerant of the system leakage.
Yes
Validate: Connect the pressure gauge to the gauge
joint of the system, check whether the pressure is
lower than 0.15MPa.
The refrigerant pipe is blocked.
Yes
Drop refrigerant, then use the high pressure
nitrogen or refrigerant to blow pipe,
vacuumize and add the refrigerant again.
No
Replace outdoor main board.
No
No
Yes
Replace low pressure switch.
Leak hunting: charge nitrogen or refrigerant to
the system, if the leakage is serious, there will
be distinct gas leakage “cici” sound; if the
refrigerant leakage is little, use the suds
(mixture of water and abluent is also ok, if it
can make bubble) or electronic leak detector.