SRVO-049: OHAL1 alarm (amplifier overheat)
The thermostat in the amplifier's transformer tripped - the amplifier itself is overheating.
What it means
The thermostat in the amplifier's transformer tripped - the amplifier itself is overheating. Posts per amplifier (axes 1-2 or 1-2-3). Cooling problem or workload problem; power-cycle to clear.
Common causes
Ranked by what technicians most often find, most likely first.
- Stopped fan or clogged vents/filters on the cabinet.
- Punishing duty cycle heating the amplifier beyond its cooling capacity.
- Amplifier or thermostat fault if it trips cool.
How to fix it
- Check cabinet fans spin and vents are clear; clean or replace filters.
- If the operating condition is severe, relax the duty where possible.
- Persistent tripping with good cooling and reasonable duty goes to the maintenance manual's amplifier checks.
Quick facts
- Category
- Servo
- Affected series
- R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
- Alarm family
- SRVO
Related codes
- SRVO-050Collision Detect alarm
- SRVO-047LVAL alarm (low control voltage)
- SRVO-046OVC alarm (overcurrent RMS)
- SRVO-045HCAL alarm (overcurrent)
- SRVO-044DCHVAL alarm (DC link overvoltage)
- SRVO-043DCAL alarm (regenerative discharge)
- SRVO-062BZAL alarm (pulse coder battery zero)
- SRVO-063RCAL alarm (rotation counter abnormal)