ERS
®
Manual / AirCool
®
plus
-System / SP72_TA1C8 / -55°C +200°C / Ver. 02.02 47
11.1.2 Changing the power amplifier NB1
Procedure:
1.
2. Disconnect the cables (+/ red) and (-/ blue) from the power amplifier at the relay
KB1, plug 6 and plug 4!
3. Disconnect the connection cable GND, pilot wire and F6 at the power amplifier
from the contact pins GND, A und 01!
4. Loosen the two srews (5) and pull the power amplifier from the brackets!
5. Replace the power amplifier by a new part of the same type!
6. Fasten the both screws (5).
7. Attach the connecting cable (see point 3) at the contact pins of the power
amplifier again.
8. Attach the connecting cable of the power amplifier (+/red, -/blue) at the relay KB1
(plug 6 and 4) again.
RD
GND
A
O1
+
-
Control input
BK
F6
KB1(6)
BU
GND/ WH
M
J
1
1
0
3
3
M
J
1
1
0
3
3
F
a
n
E
B
1
5
5
B
KB1(4
BK
Bracket
Fig. 11.1.2a Fan Fig. 11.1.2b Detail B/
Power amplifier NB1
Danger
Switch off and disconnect from mains before servicing!