Flashes And "Fault" Is Displayed; Flashes And "Service" Is Displayed; Controls Locked Out" Is Displayed; External Hook-Up" Is Displayed - Viessmann VITOCROSSAL 300 CU3A 35 Operating Instructions Manual
Floor mounted, gas-fired condensing boiler with matrix gas burner and lambda pro control, for operation with natural gas and liquid propane gas, heating input 19 to 199 mbh, 5.6 to 58 kw, with vitotronic 200 kw6b controls
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Also See for VITOCROSSAL 300 CU3A 35:
- Technical data manual (33 pages) ,
- Service instructions manual (116 pages) ,
- Installation instructions manual (60 pages)
Table of Contents
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Troubleshooting
"
" Flashes and "Fault" is Displayed
Cause
Heating system fault.
Flashes and "Service" is Displayed
" "
Cause
The time for a service, as specified by your heating
contractor, has arrived.
"Controls Locked Out" is Displayed
Cause
Control was blocked by your heating contractor.
"External Hook-up" is Displayed
Cause
The operating program set at the control unit was
changed by an external device, e.g. extension EA1.
"External Program" is Displayed
Cause
The operating program set at the control unit was
changed by the Vitocom communication interface
38
Vitocrossal 300 CU3A 26 to 199 Operating
Remedy
Proceed as described (refer to page 34).
Remedy
Proceed as described on page 33.
Remedy
Your heating contractor can lift this block.
Remedy
No remedy is required.
Remedy
You can change the operating program.
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