4. Electrical work
4.1.7. Switch setting
It is possible to set the following function by setting the switch of the interface controller.
Set switches in case of auto step mode.
4.1.8. Before test run
After completing installation and the wiring and piping of the local application and outdoor units, check for refrigerant leakage, looseness in the power supply or control
wiring, wrong polarity, and no disconnection of one phase in the supply.
Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and ground is at least 1.0MΩ.
Warning:
Do not use the system if the insulation resistance is less than 1.0MΩ.
Caution:
Do not carry out this test on the control wiring (low voltage circuit) terminals.
SW2-1
SW2-2
Details
OFF
OFF
Not FIX (Depending on Remote controller setting)
ON
OFF
[Cooling] FIX
OFF
ON
[Heating] FIX
ON
ON
External input (Depending on TB62 3-4)
• SW2-1/2-2 : Fixed operation mode
SW2-3
SW2-4
SW2-5
Details
OFF
OFF
OFF
Not fixed (Remote controller setting)
ON
OFF
OFF
Cooling 19°C/Heating 17°C FIX
OFF
ON
OFF
20°C FIX
ON
ON
OFF
22°C FIX
OFF
OFF
ON
24°C FIX
ON
OFF
ON
26°C FIX
OFF
ON
ON
28°C FIX
ON
ON
ON
Cooling 30°C/Heating 28°C FIX
• SW2-3/2-4/2-5 : Fixed set temperature [For Auto step mode only]
SW3-4
SW3-5
Differential
OFF
OFF
1°C
OFF
ON
2°C
ON
OFF
3°C
*1
ON
ON
4°C
*1. Standard setting : 3°C
• SW3-4/3-5 : Thermo OFF point by HEX inlet air temp.
(difference between target temp. and HEX inlet temp.)
[For Auto step mode and supply air temp. control]
Compressor is forced to stop when HEX inlet temp. is close to target temp. to reduce frequent ON/OFF cycling under low heating/cooling load condition.
*1. This function is valid only with remote controller.
*2. This SW must be set to “OFF”.
DIP switch
Function
OFF
ON
SW1-4
HEX inlet temp. thermistor (TH11)
*2
WITH
WITHOUT
SW1-5
2-phase temp. thermistor (TH5)
WITH
WITHOUT
SW1-6
Time stamp function on SD card data
Not available
Available
*1
SW1-7
Position of target temp. thermistor (TH1)
Supply Air temp. control
Return Air temp. control
SW1-8
Intelligent multiple outdoor units control
Inactive
Active
SW2-6
LEV self control
*2
OFF
ON
SW2-7
Ref. liquid temp. thermistor (TH2)
*2
WITH
WITHOUT
SW2-8
Target temp. thermistor (TH1)
WITH
WITHOUT
• Other DIP switch setting
4.1.6. Wiring specification External output / External input
Locally supplied parts
Item
Name
Model and specifications
External output function External output signal wire Use sheathed vinyl coated cord or cable.
Wire type :
CV, CVS or equivalent.
Wire size :
Stranded wire 0.5mm
2
to 1.25mm
2
Solid wire:
{
0.65mm to
{
1.2mm
Display lamp, etc.
Non-voltage Contact 220-240V AC (30V DC), 1A or less
10 mA, 5 V DC or more
External input function
External input signal wire
Use sheathed vinyl coated cord or cable.
Wire type :
CV, CVS or equivalent.
Wire size :
Stranded wire 0.5mm
2
to 1.25mm
2
Solid wire :
{
0.65mm to
{
1.2mm
Switch
Non-voltage "a" contact
10
EN