Shutting Down The System - Viessmann Vitocrossal CRU 800 Service Instructions For Contractors

Commissioning, inspection, maintenance
Checking the ionisation current
07. Read the ionisation current.
08. Enter the actual value in the service report.
09. Press and hold S for longer than 2 s,
10. repeatedly, until "5" is shown under "Service".

Shutting down the system

1. Isolate the system from the power supply, e.g. by
removing the separate fuse or by means of a
mains isolator, and check that it is no longer live.
Safeguard the system against reconnection.
Danger
An electric shock can be life threatening.
Before opening the boiler, disconnect it from
the mains voltage, e.g. at the fuse or mains
isolator.
18
(cont.)
11. S to confirm, "5" is shown under "Status".
12. repeatedly, until "0" is shown under "Service".
flashes. 13. S to change to the operating display.
2. Close the gas shut-off valve.