Midea MSE-07CR, Руководство по обслуживанию

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Service manual
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Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
5. Set the 2-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
7. Immediately set the 3-way valve to the closed position.
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Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
8. Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and service port
caps.
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Use a torque wrench to tighten the service port cap to a torque of 1.8 kg.m.
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Be sure to check for gas leakage.
8.6 Re-air purging (Re-installation)
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the closed position.
2. Connect the charge set and a charging cylinder to the service port of the 3-way valve.
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Leave the valve on the charging cylinder closed.
3. Air purging.
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Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on
the 2-way valve approximately 45’ for 3 seconds then closing it for 1 minutes; repeat 3 times.
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After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve.
4. Check the gas leakage.