Electrical documentation
62
© Solarbayer GmbH [210205]
Fuses
A fuse change may only be carried out by trained specialist personnel with the 230 V AC supply
disconnected. The applicable safety regulations and rules must be observed!
The power supply for the electronics is protected by fine-wire fuses.
To change a fuse, please observe the following overview with the arrangement of the fuses on the power unit:
Fuses
Value
Description
Configuration
F1
0,08 A/T
–
Back-up fuse transformer (electronics)
F2
3,15 A/T
–
Fuse protection for 230 V supply according to
STL for relay (heat exchanger cleaning) and
phase angle control (exhaust blower)
[see picture p. 53]
In addition, self-resetting PTC fuses are used:
Fuses
Value
Description
Configuration
F3
0,12 A
+24 V-1
+24 V output for digital inputs:
DI0 X2 for filling chamber door
DI1 X5 for speed feedback
These PTC fuses are service-free and may only be replaced by trained specialist personnel!
The PTC fuse remains high-impedance as long as overload current is present. The PTC fuse thus protects
continuously until the fault is eliminated or the current is switched off.
When resetting itself, the resistance of the PTC fuse quickly returns to its initial value.
