R410A DC Inverter V4 Plus 50Hz MCAC-VTSM-2014-04
98 Troubleshooting
For example
Pressing the manual button continued for 10 seconds:
If all the LED lights turn off, that means the capacity code is 0 and the capacity of indoor units is
22×100W(0.8HP);
If the “Timer” and “Alarm” lights are normally on, that means the capacity code is 5=(4＋1) and the
capacity of indoor unit is 71×100W(2.5HP);
If the “Operation” and “Alarm” lights are normally on, that means the capacity code is 9=(8+1) and the
capacity of indoor unit is 140×100W(5.0HP);
If all the LED lights turn on, that means the capacity code is F=(8+4+2+1) and the capacity of indoor unit
is 160×100W(6.0HP).
The above basic principle just applies to single PCB, if the indoor unit has more than one PCB, or one PCB
can achieve a virtual multi blocks function, you must use the basic principle to calculate the achievable
capacity of single PCB at first, then add all the value as the capacity of the indoor unit .
For example
The high static pressure duct has capacity of 20kW, 25kW, 28kW and larger capacity of 40kW, 45kW, 56kW.
The “Operation” light is normally on, that means the capacity code is 8 and the achievable capacity of
single PCB is 112×100W(4.0HP), then add the value of two PCB, so the capacity of indoor unit is
200×100W(8.0HP);
The “Operation” and “Alarm” lights are normally on, that means the capacity code is 9=(8+1) and the
achievable capacity of single PCB is 140×100W(5.0HP), then add the value of two PCB, so the capacity
of indoor unit is 280×100W(10HP);
The “Operation” light is normally on, that means the capacity code is 8 and the achievable capacity of
single PCB is 112×100W(4.0HP), then add the value of four PCB, so the capacity of indoor unit is
450×100W(16HP);
The “Operation” and “Alarm” lights are normally on, that means the capacity code is 9=(8+1) and the
achievable capacity of single PCB is 140×100W(5.0HP), then add the value of four PCB, so the
capacity of indoor unit is 560×100W(20HP).
3. If the signal is weak, connect a 120Ω resistor between P and Q of the farthest indoor unit, or connect a
0.5-1.5uF capacitor between P and Q of outdoor unit. Installation refers to the following picture:
Note:
Signal wires should be shield wire and indoor units should be connected in series.
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