
E09.012.246 Manual S-WG
115
Display message
C a s c a d e
B l o c k
9 9 9 , 5
h r s
Reason
Connection failure with one of the water heaters of the cascade.
Cause:
The unit is programmed in such a way that none of the water heaters in a cascade will
fire, if one has a lockout. One unit has a lockout and therefore the whole cascade is
blocked.
Corrective action:
Troubleshoot the fault of the unit in lock-out.
Display message
G e n
B l o c k
9 9 9 , 5
h r s
Reason
General blocking circuit is activated during operation (general
blocking contacts 7-8).
Cause:
The circuit connected to the general blocking terminals is not closed.
Corrective action:
Check all external components that are connected to the general blocking terminals and
check why the contact is not closing during heat demand.
Cause: If used in combination with flow switch:
The water flow through the unit is too low.
Corrective action:
Check functioning of the pump and the flow switch.
Check/open all valves that might restrict the water flow through the unit.
Check for an external system pump that influences flow through the unit.
Check if the system resistance exceeds the spare capacity of the unit pump.
Make sure the heat exchanger is clean. Heat exchanger fouling (partly blockage) will
increase the resistance causing the water flow to drop.
Содержание S-WG 100
Страница 13: ...E09 012 246 Manual S WG 14 3 3 S WG tanks 300 Ltr 450 Ltr ...
Страница 14: ...E09 012 246 Manual S WG 15 750 Ltr ...
Страница 33: ...E09 012 246 Manual S WG 34 7 4 Electrical schematics ...
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Страница 39: ...E09 012 246 Manual S WG 40 For large capacity installations more than two water heaters consult STREBEL ...
Страница 122: ...E09 012 246 Manual S WG 123 notes ...
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