Mitsubishi Electric MXZ-3HA50VF2 Manual De Instalación página 12

4-4. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Description of the function:
With this function, once the operation mode is locked to either COOL/DRY mode
or HEAT mode, the air conditioner operates in that mode only.
* Changing the setting is required to activate this function. Please explain about
this function to your customers and ask them whether they want to use it.
[How to lock the operation mode]
1) Be sure to turn off the main power for the air conditioner before making the
setting.
2) Set the "3" of SW1 on the outdoor controller board to ON to enable this function.
3) To lock the operation mode in COOL/DRY mode, set the "4" of SW1 on the
outdoor controller board to OFF. To lock the operation in HEAT mode, set the
same switch to ON.
4) Turn on the main power for the air conditioner.
4-5. LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
• Description of the function:
With this function, the operating noise of the outdoor unit can be lowered by reducing the operation load, for example, during nighttime in COOL mode.
However, please note that the cooling and heating capacity may lower if this function is activated.
* Changing the setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it.
[How to lower the operating noise]
1) Be sure to turn off the main power for the air conditioner before making the setting.
2) Set the "5" of SW1 on the outdoor controller board to ON to enable this function.
3) Turn on the main power for the air conditioner.
4-6. TEST RUN
• Test runs of the indoor units should be performed individually. See the installation manual coming with the indoor unit, and make sure all the units operate
properly.
• If the test run with all the units is performed at once, possible erroneous connections of the refrigerant pipes and the indoor/outdoor unit connecting wires
cannot be detected. Thus, be sure to perform the test run one by one.
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 combi-
nation, 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 is "Not completed", 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 below.
En-10
LED
SW1
SW871
SW1
ON
SW2
1 2 3 4 5 6
COOL/DRY
Lower the operating noise
LED indication during detection:
LED1 LED2 LED3
(Red) (Yellow) (Green)
Lit Lit Once
Result of piping/wiring correction function
LED1 LED2 LED3
(Red) (Yellow) (Green)
Completed
Lit Not lit Lit (Problem corrected or
normal)
Not completed
Once Once Once
(Detection failed)
Refer to "SAFETY PRE-
CAUTIONS WHEN LED
Other indications
BLINKS" located behind
the top panel.
SW1
ON
1 2 3 4 5 6
HEAT
Result