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Trouble Shooting
Service Manual Deli Multisserie form 9123560 rev. 02/2017
Description of part
Symptoms
Possible cause
Action
Control defect
Key board fails.
No display.
Display shows strange
things.
Outputs fail.
Inputs fail.
Loose flatcable.
Broken part.
Check keyboard and I/O
boards.
See I/O test in service menu.
Fuses blown
Check fuses
Relais defect
Check relay
Wrong software or loss of
data.
Check software version or
upload latest software
Parameters not on right
settings.
Check parameters
Steam leakage
Check sealing of shaft and
heating elements.
Transformer output vol-
tage too high.
Check transformer.
Temperature too high.
Check cooling air flow. Clean
grids.
Security thermostat
The unit will not start up
Problem with ventilators.
(rotate too slow)
Malfunction of vane
switches.
Sticking contact(s) of
contactor(s).
Broken thermostat.
Check these items.
Steam leakage
Controller not stable. Pro-
grams act strange.
Controller switches off du-
ring program.
Visibility of LCD gets worse.
Leakage of steam throu-
gh ventilator shaft.
Leakage of steam throu-
gh gasket of heating
element
Check sealings of these
items.
(remove ventilator plate pos
117 and the fanblade of the
blower)
Cooling air flow
Controller overheated
Cooling air flow blocked.
Clean air grids.
Relay for compressor,
water filter etc.
The output is not switching
on
Broken contact
Replace relay
The output is not switching
off
Contact sticks, relay hangs Replace relay
Transformer defect
Unable to switch ON the
Multisserie.
Internal short circuit in
transformer (gets hot).
Fuse F1 and/or F2 blown
Check and replace transfor-
mer if necessary.
Symptom
Possible cause
Caused by
Controls defect
Leakage of steam through
ventilator shaft
Leakage of steam through hea-
ting element
Cooling air flow blocked
Fuses blown
TROUBLESHOOTING BY PART / FUNCTION
