Toa DA-250DH CU - Manual (Page 17)

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11. PROTECTION OPERATION LIST
Failure Protection Operation Indicator Remedy Recovery
Overcurrent due
to overload Current limiter activated
when impedance drops
below the specified
value. Peak indicator lights. Remove overload. Connecting a correct load
automatically restores
normal operation.
Short circuit Current limiter activated.
Load is disconnected. Protection indicator
lights. Check speakers
and lines for short
circuit.
Temperature rise
at power amp.
heat sink
(over 100°C or 212°F) Load disconnected. Protection indicator
lights.
Temperature rise
inside the unit
(over 80°C or 176°F) Built-in amplifier unit
that caused the failure
halted. Four indicators of
the corresponding
channel extinguish.
Check the unit for
correct ventilation
and overload. Operation automatically
returns to normal when
the temperature decreases.
Abnormal DC
voltage output Load disconnected. Protection indicator
lights. Contact the TOA dealer where the unit was
purchased.
Turn off this unit's Power
switch. Correct the load,
then turn on the power.
12. TAMPER-PROOF CAP ATTACHMENT
To protect the input level control from accidental operation, it is recommended to replace the control knob with
the supplied tamper-proof cap as illustrated.
Input level control
Tamper-proof cap (accessory)