11 | Troubleshooting
30 / 36 0870231979_WT0100-0730CP_CV_-0001_IM_en
Problem Possible Cause Remedy
The motor is running the
wrong way.
Wrong power supply. • Switch two phases to re-
verses the direction of re-
volutions.
Abnormal motor tempera-
ture.
Motor fault or fault in motor
bearings.
• Repair and replace the
motor.
The motor is incorrectly
electrically wired.
• Check and reconnect.
Overloading. • Look for causes of in-
creased differential pres-
sure in the system and re-
pair.
Wrong power supply. • The power supply must
be consistent with data
on motor’s type sign.
Too high ambient tempera-
ture (+40°C).
• Improve ventilation in the
machine room.
Fault on motor fan. • Repair and replace the
motor fan.
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