Convotherm OEB Series Service Handbook page 129

Service manual OEB/OES/OGB/OGS
Error code
Error message, display flashing
OHF
Frequency converter too
hot
OLF
Motor overload
OPFI
One motor phase lost
OPF2
All motor phases lost
OSF
Mains over-voltage
PHF
Mains phase lost
SCFI
Motor short-circuit
SCF3
Short-to-ground
SCF4
Short-circuit in IGBT
SCFS
Short-circuit in dc-link
charging
SLF3
HMI communication
SOF
Excess speed
tnF
Motor measurement
tJF
IGBT too hot
USF
Under-voltage
 If an error code is not listed in the table and it is not possible to reset the error using "ESC"
(see indications given by the display of the frequency converter (Altivar 12) when there is a fault but no
error message), please contact the manufacturer of the combi steamer or replace the frequency
converter.
5_00e Troubleshooting list_L
Possible cause
Temperature of frequency converter too
high
Motor current too high
One phase on the frequency converter
has dropped out
 Motor not connected
Motor unstable
 Mains voltage too high
Faulty power supply

Faulty supply for frequency
converter
Fuse has blown
A phase has dropped out
Unbalanced load
 Short-circuit or short-to-ground
at frequency converter output
Short-to-ground during operation
Commutation of motor while running
Large leakage current to ground at
frequency converter output
Short-circuit of internal power electronics
when switching on

Short-circuit at frequency
converter output
Short-circuit identified for move
command or DC brake command
Communications error between
frequency converter and display
Instability
 Motor not connected to the
frequency converter
One motor phase lost
 Frequency converter
overheating
Internal IGBT temperature too high for
load and ambient temperature
 Mains voltage too low
Temporary mains failure
26/27
Corrective action
 Check motor load
Check ventilation of frequency converter
Check ambient temperature
Let the frequency converter cool down
before switching it back on
Check motor load
Check connections between frequency
converter and motor
Check connections between frequency
converter and motor
Check mains voltage

Check power supply to
frequency converter
Check fuse
 Check connecting cable
between frequency converter and motor
Check motor insulation
Replace the frequency converter

Check connecting cable
between frequency converter and motor
Check motor insulation
Replace the frequency converter
Check motor
Check compatibility of motor and
frequency converter
Let the frequency converter cool down
before switching it back on
 Check power supply to
frequency converter
Check mains voltage
2013-01-30