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Midea MSX-xxHRDN1 Split-Type X Type Design Manual

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A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
CAUTION
Indoor unit
check point D
B
C
A
Outdoor unit
check point
Cover
Fig.27
Gas leak check
1. Soap water method:
Apply a soap water or a liquid neutral
detergent on the indoor unit connection or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping. If bubbles come out, the pipes
have leakage.
2. Leak detector
Use the leak detector to check for leakage.
14
TEST RUNNING
Test running
Perform test operation after completing gas
leak check at the flare nut connections and
electrical safety check.
Check that all tubing and wiring have been
properly connected.
Check that the gas and liquid side service
valves are fully open.
1. Connect the power, press the ON/OFF button
on the remote controller to turn the unit on.
2. Use the MODE button to select COOL, HEAT,
AUTO and FAN to check if all the functions
works well.
3. When the ambient temperature is too low
O
(lower than 17 C), the unit cannot be controlled
by the remote controller to run at cooling
mode, manual operation can be taken. Manual
operation is used only when the remote
controller is disable or maintenance necessary.
Hold the panel sides and lift the panel up to
an angle until it remains fixed with a clicking
sound.
Press the Manual control button to select the
AUTO or COOL, the unit will operate under
Forced AUTO or COOL mode(see User
Manual for details).
4. The test operation should last about 30 minutes.
3. Electrical leakage check (performing during
test running)
During test operation after finishing installation,
the serviceman can use the electroprobe
and multimeter to perform the electrical leakage
check. Turn off the unit immediately if leakage
happens. Check and find out the solution ways
till the unit operate properly.
Manual control
button
AUTO/COOL
Fig.28
… 15


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