SRVO-156: IPMAL alarm (overcurrent)
Abnormally high current in the amplifier's main circuit - same disease as SRVO-045 HCAL, detected at the intelligent power module.
What it means
Abnormally high current in the amplifier's main circuit - same disease as SRVO-045 HCAL, detected at the intelligent power module. Same isolation-test diagnosis.
Common causes
Ranked by what technicians most often find, most likely first.
- Same as SRVO-045: shorted motor power cable, failed motor windings, or a failed amplifier.
How to fix it
- Work the SRVO-045 procedure: power off and lock out, disconnect power AND brake cables (support the axis first - the brake disconnect can drop a gravity axis), test whether the amplifier alarms alone, insulation-test the cable, and measure phase-to-phase resistance. Qualified personnel only. Power-cycle to clear.