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Electrical Wiring
Terminal No.
X4
TA1
X4.1
l
TA2
X4.2
l
l
E1.1
X4.3
E1.2
X4.4
l
E2.1
X4.5
l
l
E2.2
X4.6
OP1
X4.7
l
OP2
X4.8
l
l
OP3
X4.9
OP4
X4.10
l
OP5
X4.11
l
l
OP6
X4.12
OT1
X4.13
l
OT2
X4.14
l
5
l
OT3
X4.15
OT4
X4.16
l
OT5
X4.17
l
l
OT6
X4.18
Terminal No.
X5
U1
X5.1
l
l
U2
X5.2
R1
X5.3
l
R2
X5.4
l
l
R1
X5.5
R2
X5.6
l
To be continued on next page.
72
Allocation
Function
No polarity
Suction Temperature Sensor TA (included)
(Room Temperature Sensor)
No polarity
No polarity
Sensor E1 / TH2
No polarity
No polarity
Sensor E2 / TH3
No polarity
COM for OP2 - OP6 Higher
+ 12 V DC
Potential
Lower Potential for Defrost
Defrost signal output
Lower Potential for
Thermostat signal output
Thermostat ON
Lower Potential for Cool
Cool operation signal output
Operation
Lower Potential for Heat
Heat operation signal output
Operation
Lower Potential for Fan
Fan (free cooling) operation signal output
Operation
COM for OT2 - OT6
COM -2.5 ... - 5.0 V DC
Lower Potential
Heat input Higher Potential
Heat mode input
Cool input Higher Potential
Cool mode input
Demand Input 1
LV1 demand control input
Higher Potential
Demand Input 2
LV2 demand control / QUIET input
Higher Potential
Demand Input 3
LV3 demand control / EXCT (forcibly thermostat off)
Higher Potential
input
Allocation
Function
No polarity
Communication bus wiring P-link
No polarity
No polarity
Terminal for Group Wiring (RC connection)
No polarity
No polarity
Terminal for Group Wiring (RC connection)
No polarity
Description
12 V DC relay required for each signal output, field supplied
Internal potential 2,5 - 5 V DC 0.5mA Current
Demand control, QUIET and EXCT inputs must be set using
indoor unit detailed settings, parameter code 0002EE, please
see relevant technical data service manual for details. Internal
potential 2,5 - 5 V DC 0.5mA Current
Description
Required for centralized controller
Internal Potential: 16 V DC
Internal Potential: 16 V DC
AHU Kit – Installation Instructions – 11/2021
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