B4 Ad Converter - Viessmann VITOTRONIC 200 Service Instructions Manual

Message overview
(cont.)
Cause
Parameter "5030 Output compressor stage" is set
■
incorrectly.
Error in recognising appliance version, incorrect cod-
■
ing card or PCBs faulty
Vitocal 300-A, type AWO-AC 301.B:
Cable harness for pressure sensor and fill level sen-
■
sor in refrigerant collector faulty
Charge level sensor of refrigerant collector faulty
■

B4 AD converter

Heat pump does not start.
Cause
Internal fault ADC (analogue digital converter, refer-
ence), ribbon cable between sensor PCB and main
PCB faulty, or PCBs faulty.
B5 Hardware
Heat pump does not start.
Addition- Cause
al code
DF Flash memory fault, main PCB.
BF Communication module
No communication via LON.
Cause
Incorrect LON communication module.
■
Incorrect wiring in LON
■
Measure
Correct setting for "5030 Output compressor
■
stage".
Check the coding card: See "Controller and sensor
■
PCB". Replace the coding card if necessary.
Check PCBs. Replace PCBs if required.
■
Vitocal 100-S/111-S:
■
Check the ID of the jumper (blue) on the main PCB of
the outdoor unit: See chapter "Main PCB [7] / [7-1]".
Vitocal 200-A/200-S/222-A/222-S:
■
Check the DIP switch on the EEV PCB of the outdoor
unit: See chapter "EEV PCB [4-3] / [4-4]".
Vitocal 222-G/333-G:
■
Check the DIP switch on the EEV PCB: See chapter
"EEV PCB [4-6] / [4-7]".
Vitocal 300-A, type AWO-AC 301.B:
■
Check cable harness and/or fill level sensor for refrig-
erant collector: See chapter "EEV PCB [4]".
Note
After removing the fault, switch appliance off and on
again.
Measure
Check PCB; if necessary, replace in the following order:
Controller and sensor PCB, main PCB.
Note
After removing the fault, switch appliance off and on
again.
Measure
Replace main PCB (see "main PCB").
Measure
Replace LON communication module.
■
Check wiring in LON and correct if required.
■
Troubleshooting
95