Technical information

1.11.4 Rotational direction of Scroll compressors
The Scroll compressors and the fans only operate correctly if they rotate in the correct direction. All of
the motors and compressors in the unit are connected so that they rotate correctly.
If the compressors are not connected correctly and are rotating in the wrong direction:
• The compressor will not compress.
• Operating noise will be abnormal.
• Electricity consumption (A) will be low.
• They overheat.
The phase detector must have both LEDs lit for correct operation:
• Green LED lit means: Power ON.
• Yellow LED lit means: Relay ON.
1.11.5 Preparation and connecting to the various utilities
Electricity. Power and control
Wiring diagrams
Electrical installation YLCA / YLHA 40
A
YLCA / YLHA termi‐
nal strip
c Remote ON / OFF switch
B
Outdoor terminal
strip
d
Remote COOL / HEAT switch
CLOSED = COOL
OPEN = HEAT
(YLHA units only)
C Main switch
a
Supply (400 ‑ 3 + N ‑
ph ‑ 50 Hz)
e Auxiliary heater
b
General alarm (volt‐
age-free inverter
contact max. 2A re‐
sist. at 230 Vac)
f
Pump relay (max. 2A resist. at
230 Vac)
(version with no Hydro kit on‐
ly)
□ YLCA / YLHA strip terminal ◊ Voltage-free terminal strip contact A
Ø Outdoor unit terminals - ‑ ‑ Client's electrical installation
○ 230 Vac terminal
C A U T I O N
The cable used for the unit power supply must be H05 RN ‑ F
Technical Information
1
Instructions for installation and connection of the unit 1.11
47