INSTALLATION | Appliance installation
36
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i
Information
For the cables inside the control box on the indoor
unit, use the cable strain reliefs provided.
Material damage
An external source of voltage at the sensor termi-
nals can destroy the OTE controller.
»
Ensure that no 230 VAC or 400 VAC cables
are touching the sensor terminals on the OTE
controller.
»
Connect the power supply cable for the control circuit
(X3).
»
Connect the power supply for the main power circuit
(X1).
»
Connect the power supply for the electric booster
heater, if present (KM2, X8).
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KM2
Terminal
Description
X1
L1/L2/L3/N Connection from main power circuit (compres-
sor and fan) to three-phase alternating current
L/N/PE
Connection from main power circuit (compres-
sor and fan) to single phase alternating current
X2
L1/N
Connection for fan power supply (for outdoor
unit)
X2
TK1/TK2
Fan fault message
X3
L/N
Mains connection for control circuit (OTE)
X3
LS/21
PSU signal contact
KM2 L1/L2/L3
Mains connection for the electric booster
heater (comprising three individual heating
elements)
X8
N/N/N
i
Information
Connect the PE conductor from the power cables
to the earth rail in the control box.
WARNING: Electrocution
When the appliance power supply is on, there will
always be 230 VAC at the PSU signal contact.
When using the PSU signal contact („PSU signal contact“
on page 24), please note the following:
»
Remove the factory-fitted clamp on X3 (LS/21).
»
Connect the cable for the PSU signal contact to X3
(LS/21).
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10.4.3 Electrical connection of the outdoor unit
The outdoor unit receives its power supply via the indoor
unit.
»
Remove the side casing panel from the outdoor unit
to gain access to the terminal box (see „Disassem-
bling the appliance casing“ on page 26).
»
Connect the fan power supply in the terminal box.
»
Connect the lead for the defrost sensors (TQE, TQA).
»
Connect the fan speed lead (0-10 VDC). Make sure
that the polarity of the lead is correct.
»
Connect the lead for suction gas sensor S2 to the ter-
minal provided.
»
Connect the cable for the stepper motor of expan-
sion valve A (located in the outdoor unit). Be sure
that each wire is connected correctly according to its
colour.
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