Checking The Fuse/Mcb - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Troubleshooting
Maintenance
(cont.)
Fig. 63

Checking the fuse/MCB

A
Fig. 64
1. Switch off the power supply.
2. Release the side closures and pivot the control unit
down.
108
1. Disconnect the leads from temperature limiter
2. Check continuity of the temperature limiter with a
A
multimeter.
3. Remove faulty temperature limiter.
4. Coat the new temperature limiter with heat con-
ducting paste and install it.
5. After commissioning, press reset button R on the
control unit.
F1
3. Remove cover
4. Check fuse F1 (see connection and wiring dia-
gram).
.
A
A .