If you got alarm SRVO-300, it's because Hand Broken is disable, but detect conductivity between HBK and 24 v signal on EE connector or servo card.
SRVO-300 SERVO Hand broken/HBK disabled
A safety hand broken is detected when setting of HBK is disabled. The most likely cause is the HBK signal of a robot connection cable being from 24V to the 0 V level.
Press reset key to clear alarm. Verify whether robot has hand broken equipment or not. If it doesn't have, HBK signal status is changed
SRVO-006 SERVO Hand broken
The safety joint (if in use) might have been broken. Alternatively, the HBK signal on the robot connection cable might be a ground fault (0V) or a cable disconnection.
If the Hand broken signal is not in use, it can be disabled by a software setting. Refer to the Controller Maintenance Manual for information on how to disable the Hand broken signal.
Press the SHIFT key, and press the alarm release button to reset the alarm condition. Continuously press the SHIFT key, and jog the tool to the work area.
Replace the safety joint.
Check the safety joint cable.
Check the FS2 fuse on the servo amplifier.
If the SRVO-214 Fuse blown alarm is also generated, the FS2 fuse has blown.
Verify the following for connector RP1 at the base of the robot :
There are no bent or dislocated pins in the male or female connectors.
The connector is securely connected.
Then verify that connector CRF7 on the servo amplifier is securely connected. Also verify that the RP1 cable is in good condition, and there are no cuts or kinks visible. Check the robot connection cable (RP1) for a ground fault or a cable disconnection.
Replace the servo amplifier.
On other controller: RJ: jumper at bottom of axis control board (HBK) you should set on A side or B side.
RJ3: jumper on servo card (CRM37A), you have a jumper connector in the controller to replace the normal connector .