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.