Location of controls (YLHD 40 and 70)
A
Fan heat switch (TK1, TK2,
TK3)
G Pump
A1
Compressor 1 heat switch
(A3)
H
Low-pressure switch
(LP)
A2
Compressor 2 heat switch
(A4)
I1 Compressor 1 (M1)
B Fan ‑1 (M3, M4, M5) I2 Compressor 2 (M2)
C Flow switch (FS) J
High-pressure switch
(HP)
D
NTC water outlet probe
(B2)
K Four-way valve
E Indoor heat exchanger L
Outdoor heat ex‐
changer
F NTC water inlet probe (B1) M Pressure sensor (B4)
Parameter tables
The following tables show the parameters and their values, divided into groups:
Parameter level codes Supervision variables
D Direct R/W Read/write parameter
U User R Read-only parameter
S Super user
F Factory
User manual 1
Operating instructions 1.5
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