En-6
4-3. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
4-4. LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
4-2. GAS CHARGE
Perform gas charge to unit.
1) Connect gas cylinder to the service port of stop valve.
2) Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3) Replenish specified amount of the refrigerant, while operating the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerat-
ing cycle.
CAUTION:
When charging the refrigerant system with additional refrigerant, be sure to use
liquid refrigerant. Adding gas refrigerant may change the composition of the refriger-
ant in the system and affect normal operation of the air conditioner. Also, charge
the liquid refrigerant slowly, otherwise the compressor will be locked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with
warm water (under 40°C) during cold season. But never use naked fire or steam.
• 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 “1” 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 “2” 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.
• 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.
4-5. CHANGING THE AMPERE LIMIT
• Description of the function:
With this function, the amount of current that flows in the outdoor unit can be
changed.
Note:
Use this function only when the amount of current exceeds the allowed value.
[How to change the ampere limit]
1) Be sure to turn off the main power for the air conditioner before making the
setting.
2) Make the setting referring to the table below.
3) Turn on the main power for the air conditioner.
Lower the operating noise
[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 “3” of SW1 on the outdoor controller board to ON to enable this function.
3) Turn on the main power for the air conditioner.
Union
Stop valve
Liquid
pipe
Indoor
unit
Stop valve with
service port
Gas
pipe
Refrigerant gas
cylinder
operating valve
(for R410A)
Gauge manifold
valve (for R410A)
Charge hose
(for R410A)
Refrigerant gas cylinder for R410A with siphon
Electronic scale for refrigerant charging
Refrigerant (liquid)
Outdoor
unit
* E unit is for
5C100VA only.
Union
Union
Union
HEAT
COOL/DRY
SW2
MXZ-5C100VA
MXZ-4C80VA
10.5 A
10.5 A
15.5 A
15.5 A
Factory setting
Full
Factory setting
Full
JG79A366H03_en.indd 6
2016/03/02 8:49:50
