Viessmann Series B2HA 60 Operations Instructions download pdf (Page 133)

133

Dis-

played

fault

code

Const. Weath.-

comp.

System char-

acteristics

Cause Measures

Fd X X Burner in a fault

state and addi-

tional fault b7 is

displayed

Coding card

missing

Insert coding card.

Press reset button

R.

Replace control

unit if fault per-

sists.

Fd X X Burner in a fault

state

Fault, burner

control unit

Check ignition

electrodes and

connecting cables.

Check whether a

strong interference

(EMC) field exists

near the appliance.

Press reset button

R.

Replace control

unit if fault per-

sists.

FE X X Burner blocked

or in a fault

state

Coding card

or main PCB

faulty, or in-

correct cod-

ing card

Press reset button

R. If the fault per-

sists, check the

coding card and re-

place coding card

or control unit if

necessary.

FF X X Burner blocked

or in a fault

state

Internal fault

or reset but-

ton R

blocked

Restart the appli-

ance. Replace the

control unit if the

appliance will not

restart.

Troubleshooting

Fault codes

(cont.)

5585 174 GB

Service

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