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Troubleshooting
148
22:6 OVERHEAT INTERNAL
The Motor Control Unit indicates error E.OHI.
Internal overheating in frequency controller. Can only be reset when internal temperature has
dropped by 3 °C.
This is indicated by message E.nOHI. See also error code 22:7.
Internal message 6.
Recommended actions:
1. Switch off the main power to machine for 30 minutes.
2. Restart the machine.
22:7 NO OVERHEAT INTERNAL
The Motor Control Unit indicates error E.nOHI.
Error OVERHEAT INTERNAL is reset. See also error code 22:6.
Internal message 7.
Recommended actions:
1. Switch off the main power to machine for 5 minutes.
2. Restart the machine.
22:8 OVERHEAT POWER MODULE
The Motor Control Unit indicates error E.OH.
Too high temperature on power module heat sink.
Error can only be reset when temperature is normal again. This is indicated by message E.nOH.
See also error code 22:36.
Internal message 8.
Recommended actions:
1. Check that cooling fan is working and that fan grid is not clogged..
2. Check that heat sink is not soiled.
3. Very high ambient temperature.
4. Switch off the main power to machine for 30 minutes.
5. Restart the machine.
22:9 DRIVE OVERHEAT
The Motor Control Unit indicates error E.dOH.
Motor temperature too high. Can only be reset when motor temperature has dropped (E.ndOH,
Resistance at terminals T1/T2 > 1650 Ω) This is indicated by message E.ndOH. See also error
code 22:11)
Internal message 9.
Recommended actions:
1. Switch off the mainpower for 30 minutes until motor has cooled down.
2. Restart the machine. If problem persists, check motor windings etc.
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