22
Troubleshooting
Diagnosis (burner control unit LMO14. ...)
(cont.)
Fault/
characteristics
Flashing
code
red at
LMO14
Cause
Remedy
Burner does
not start (no
fault display),
indicator does
not illuminate
No voltage
Check fuse or
connector
aBÖ
in control
unit, electrical
connections, setting of
heating system ON/OFF
switch on control unit and
mains electrical isolator
High limit safety cut−out
activated
Press reset button on
boiler control unit
Burner does
not start (no
fault display),
indicator
illuminates
10×
Faulty electrical
connection, wiresL
1 and
N interchanged or faulty
burner control unit
Check electrical
connection.
If phases are correctly
connected, replace
burner control unit.
Burner does
(
2×
Motor faulty
Replace motor
not start (with
fault)
2×
Clutch between motor
and oil pump faulty
Replace clutch
2×
Oil pump seized or stiff
Clean or, if necessary,
replace oil pump
8×
Oil preheater faulty
Replace oil preheater
Burner starts,
but no flame is
f
d
2×
Ignition electrodes
poorly adjusted
Adjust correctly (see
page13)
formed
2×
Ignition electrodes damp
and contaminated
Clean ignition electrode
block
2×
Insulation of ignition
electrodes cracked
Replace ignition
electrode block
2×
Ignition transformer
faulty
Replace ignition
transformer
2×
Ignition cable faulty
Replace ignition cable
2×
Pump does not supply
oil
Install pressure and
vacuum gauges on
pump and check build−
up of pressure (see
following paragraph)
5692589GB
Summary of Contents for VEK
Page 31: ...31 Parts list Parts list cont 5692 589 GB 002 001 017 005 049 009...
Page 33: ...33 Parts list Parts list cont 5692 589 GB 047 020 041 021 040 80o 80p 034 033 046 039 038...
Page 37: ...37 Appendix 5692 589 GB...
Page 39: ...39 Appendix Maint service Maint service Maint service Maint service 5692 589 GB...
Page 41: ...41 Appendix Maint service Maint service Maint service Maint service 5692 589 GB...
Page 42: ...42 Appendix 5692 589 GB...