Help me please.
I have two sets of robot abb 2400 s4.
robot # 1. Power supply alarm red lamp. Teach pendant show TPU lost contact.
robot # 2. Power supply not alarm but teach pendant show TPU lost contact.Previous Robot # 2, not alarm and change power supply to robot # 1 is available.
I Check power supply not have 15vdc and have 24 vdc.