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8. TROUBLESHOOTING
Error Codes
All possible error codes are shown in Table 8.1 below.
On DE/DT series units, operation stops and a sounding alarm accompanies occurring errors.
Pressing any key (except ) will pause the alarm. After three minutes alarm will sound again.
Upper display shows error code and error source source appears in lower display. Confirm error code
and turn power off immediately.
Table 8.1 Error Codes
Screen
Source
Causes & Solutions
Sensor Failure
Failure in temperature input circuit.
Open circuit in temperature sensor line.
Temperature out of specification range.
Contact original dealer of purchase
TRIAC Short Circuit
Electrical short in TRIAC circuit.
Faulty current transformer (CT) sensor.
Contact original dealer of purchase
Faulty or Disconnected
Heater Line
May occur when the power supply is changed during
installation or when unit is transported
Open phase in power supply: confirm whether 3-phase
power supply is connected properly.
While in operation (all models)
Heater line faulty or severed.
Faulty current transformer (CT) sensor.
Drop in supply voltage.
Contact original dealer of purchase
Fan Motor Failure
Fan motor malfunction
Contact original dealer of purchase
Independent
Overheat Prevention
Device (IOPD)
activated
Independent Overheat Prevention Device (IOPD) has
activated.
Turn ELB OFF, then back on ON (reset). Check both chamber
temperature and IOPD temperature setting.
If unit does not function normally after ELB reset, contact
original dealer of purchase
Main Relay Contact
Damaged
Turn ELB OFF, then back ON (reset) and confirm:
whether contact point on main relay is damaged.
whether current transformer (CT) sensor(s) has failed.
contact original dealer of purchase.
