Mitsubishi Electric MXZ-3A30NA Installation Manual page 9

4-3. TEST RUN
Be sure to perform the test run for each unit. Make sure each indoor
unit operates properly following the installation manual attached to the
unit.
+ If you perform the test run for all indoor units at once, you cannot de-
tect any erroneous connection, if any, of the refrigerant pipes and the
indoor/outdoor unit connecting wires.
About the restart protective mechanism
Once the compressor stops, the restart preventive device operates so the
compressor will not operate for 3 minutes to protect the air conditioner.
Wiring/piping correction function
This unit has a wiring/piping correction function which corrects wiring
and piping combination. When there is possibility of incorrect wiring and
piping combination, and confirming the combination is difficult, use this
function to detect and correct the combination by following the proce-
dures below.
Make sure that the following is done.
+ Power is supplied to the unit.
+ Stop valves are open.
Note:
During detection, the operation of the indoor unit is controlled by the out-
door unit. During detection, the indoor unit automatically stops operation.
This is not a malfunction.
Procedure
Press the piping/wiring correction switch (SW871) 71 minute or more after
turning on the power supply.
+ Correction completes in 10 to 15 minutes. When the correction is com-
pleted, its result is shown by LED indication. Details are described in
the following table.
+ To cancel this function during its operation, press the piping/wiring cor-
rection switch (SW871) again.
+ When the correction completed without error, do not press the piping/
wiring correction switch (SW871) again.
When the result was "cannot be corrected", press the piping/wiring cor-
rection switch (SW871) again to cancel this function. Then, confirm the
wiring and piping combination in a conventional manner by operating the
indoor units one by one.
+ The operation is done while the power is supplied. Make sure not to
contact parts other than the switch, including the P.C. board. This may
cause electric shock or burn by hot parts and live parts around the
switch. Contacting the live parts may cause P.C. board damage.
+ To prevent electronic control P.C. board damage, make sure to per-
form static elimination before operating this function.
+ This function does not operate when the outside temperature is 0°C
(32°F) or below.
4-4. EXPLANATION TO THE USER
+ Using the OPERATING INSTRUCTIONS, explain to the user how to
use the air conditioner (how to use the remote controller, how to re-
move the air filters, how to remove or put the remote controller in the
remote controller holder, how to clean, precautions for operation, etc.)
+ Recommend the user to read the OPERATING INSTRUCTIONS care-
fully.
LED indication during detection:
LED
4 (Red) 2 (Yellow) 3 (Green)
Lighted Lighted Blinking
Result of piping/wiring correction function
LED
1 (Red) | 2 (Yellow)
3 (Green) Result
Lighted |Not lighted Lighted |Completed (Corrected successfully)
Blinking Blinking Blinking |Cannot be corrected
Refer to "SAFETY PRECAUTIONS
Other indications WHEN LED FLASHES?" located
behind the service panel.