Repair Instructions; Fault Finding And Error Messages - Memmert BASIC Service Instructions Manual

3.

Repair instructions

These instructions describe service and maintenance operations as well as steps for dismantling of BASIC,
EXCELLENT and PERFECT ovens.
Unless otherwise described, assembly takes place in the reverse order.
Alterations in technical matters are reserved. Measurements are not binding.
4.

Fault finding and error messages

Fault details Fault details Fault cause Fault cause
General faults General faults
Controller display Fuse 100 mA (80 mA) has blown
remains dark
Main fuse 15 A has blown
Power unit faulty
Temperature can not be Turn control faulty
set and oven can not
be operated by turn
control.
Oven "blocked" by UserID card
Error messages in monitor indication Error messages in monitor indication
Warning – symbol Mechanical-action temperature limiter has switched off
alight continuously the heating
Warning – symbol Monitor controller has switched off the heating because
flashing temperature difference
between working controller and monitor controller is
too small.
Error message „E-3" Pt100 temperature probe of monitor controller is
faulty.
Error message Pt100 temperature probe of monitor controller is
„E-3" alternating with faulty. Monitor controller operates in emergency mode
temperature display with temperature value of working controller Pt100
temperature probe
Error message in timer display Error message in timer display
Error message „E-0" Serious configuration error (e.g. incorrect oven type or
incorrect temperature range)
Error message „CONF" Checksum error (error on storing the setpoints, e.g. fan
(display only appr. 10 speed)
sec after switching on)
Error message „E-L1" in Interruption in communication to power unit
timer display
Error messages in temperature display Error messages in temperature display
Error message „E-3" Pt100 temperature probe of working controller faulty
Error message „E-3" Pt100 temperature probe of working controller is
alternating with faulty. Working controller operates in emergency mode
temperature display with the temperature value of monitor controller Pt100
temperature probe.
Error message „E-1.1" Power unit triac 1 faulty
Error message „E-1.2" Power unit triac 2 faulty
Error message „E-2.1" Power unit faulty
Error message „E-2.2" Power unit faulty
Fault rectification Fault rectification
Check fuse and replace if nec.
Check fuse and replace if nec.
Replace power unit
Replace main switch module incl. turn control
Unblock using UserID card
- Switch off oven and allow to cool down.
- Check Pt100 temperature probe.
- Check temperature limiter
- The oven is again ready for operation only after fault
has been rectified and the oven has cooled down.
Increase temperature difference between monitor
temperature and working temperature.
If nec. replace Pt100 temperature probe on monitor
controller
Replace Pt100 temperature probe of monitor controller
on connector J3
Replace Pt100 temperature probe of monitor controller
on connector J3.
Replace controller
The fault can be rectified by the controller itself after
repeating the storage function of a setpoint parameter.
If the fault is repeated or can not be rectified, the
controller has to be replaced
Check connecting cable.
If nec. replace power unit
Replace Pt100 temperature probe of working controller
on connector J4
Replace Pt100 temperature probe of working controller
on connector J4.
Replace power unit
Replace power unit
Replace power unit
Replace power unit
page 5
Section Section
Section 9
Section 9
Section 8
Section 10
siehe
Betriebs-
anleitung
Section 14
Section 16
Section 16
Section 16
Section 11-
13
Section 11-
13
Section 8
Section 16
Section 16
Section 8
Section 8
Section 8
Section 8
SERVICE - UIS