KSB Riotec 30-70 [19/19] In the event of high temperatures and high system pressure the pumps should be allowed to cool down danger of liquid boiling over

Riotec / Riotec Z

Code Fault/error Error- Manual Switch off Cause Solutions

No. LED *) Reset at x

errors/

24 hrs

E52 Communication error O W** IF-modules not plugged in After 5 minutes the modules

master/slave properly, cable defect switch over to single pump mode.

Creel modules again,

Check cable

MA Master/slave not set O W Set master and slave

Pump makes noises O Cavitation as a result of insufficient Increase system-admission

admission pressure pressure (remaining within the

permissible range)

Check pump lift settings, reduce

pump lift if necessary

*) P → Permanent light, O → LED is off

**) Pump moves from regulator mode to fixed characteristic (depends on the fixed set value, see Fig. 8).

W → only a Warning – not error removal (can appear an infinite number of times)

In the event of high temperatures and high

system pressure, the pumps should be

allowed to cool down.

Danger of liquid boiling over!

If the fault cannot be remedied, please contact

your local plumbing and heating specialist or KSB

customer services.

Subject to technical alterations!