Mitsubishi Electric M Series Manual page 562

MULTI SYSTEM Inverter Heat Pump
TEST RUN
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 procedures 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 outdoor
unit. During detection, the indoor unit automatically stops operation. This is not a
malfunction.
Procedure
Press the piping/wiring correction switch (SW871) 1 minute or more after turning
on the power supply.
• Correction completes in 10 to 15 minutes. When the correction is completed,
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 correction
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 correction
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 perform static
elimination before operating this function.
• This function does not operate when the outside temperature is 0°C or be-
low.
C-560
LED indication during detection:
LED
1 (Red) 2 (Yellow) 3 (Green)
Lighted Lighted Blinking
Result of piping/wiring correction function
LED
1 (Red) 2 (Yellow) 3 (Green)
Completed
Lighted Not lighted Lighted
(Corrected successfully)
Blinking Blinking Blinking Cannot be corrected
Refer to "SAFETY PRE-
CAUTIONS WHEN LED
Other indications
FLASHES" located behind
the service panel.
M series
Result