Daikin ERLA03DAV3, Installer'S Reference Manual, Page: 90 / 192

8 | Electrical installation
Installer reference guide
90
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1A – 2020.05
7 9
YC Y2
X2M
1 2
3
A4P
1+2 Wires connected to the alarm output
3 Wire between X2M and A4P
A4P Installation of EKRP1HBAA is
required.
A
Y2 7
B
A
B
7 9
X2M
A4P
Y2
YC
X1M
a
b
a Installation of EKRP1HBAA is required.
b Prewiring between X2M/7+9 and Q1L (= thermal protector backup heater). Do NOT change.
3 Fix the cable with cable ties to the cable tie mountings.
8.3.9 To connect the changeover to external heat source
Wires: 2×0.75 mm²
Maximum load: 0.3 A, 250 V AC
Minimum load: 20 mA, 5 V DC
[A.2.2.6.1] Ext. backup heat src
1 Open the service cover. See "6.2.2 To open the outdoor unit" [
4
42].
2 Open the following (see "6.2.4 To open the indoor unit" [
4
43]):
1 Top panel
1
2
3
2 Upper front panel
3 Upper switch box cover