MX3657-01 Rev. D ©2020 Troubleshooting
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Troubleshooting Codes: Table 8
Type Alert/Fault/Error Display Buzzer Chirp Sequence Possible Cause & Suggested Corrective Action
ALERT HYSECURITY
Entrapment Mode
ENTR
2 chirps per second every 2s
while control input is active
An IES has been tripped twice within a specic period of time.
Check the gate site for obstructions and clear the gate area. To
return to run mode operation, press the Reset button.
ALERT HYSECURITY
Safe Mode
SAFE
2 chirps once when in Safe
Mode
A gate “edge” or IES has been tripped or the operator has exited
entrapment mode. Refer to the description above.
NOTE: Gate will operate, if it receives a RUN command.
ALERT Low 24VDC
DC BUSS < 21V
No chirps; LCD ashes for 1s
every 5s
Only occurs in DC powered operators.
ALERT Critical Low Power No chirps: LCD steady and
controls disabled
The system monitors the 24V control voltage in lieu of line voltage.
Low incoming line voltage will cause low control voltage. Verify that
the control transformer is connected properly, (white – not used,
red for 208V, orange for 230V and blue for 460V). Refer to Control
Transformer Connections (Non-UPS) on page 35.
As the motor starts, check the line voltage with a meter that has
min/max hold capability. If the line voltage drops more than 10%
below nominal (187 on 208 VAC, 207 on 230 VAC, or 416 on 460
VAC) the voltage is dropping too much and must be corrected.
Generally, this requires larger wire size. On 3-Phase operators, check
each leg to ground to make sure it is balanced.
If the line voltage is not dropping below these limits, check the
24V AC and DC power at the power supply. Voltages less than
20V indicate an overloaded or failing transformer or power supply
board. Remove the loads until the fault is found.
ALERT Dead Battery
DC BUSS < 21V
3 chirps upon any operating
command entry
DC operators only. Appears when the 24 VDC power drops too low,
disabling the operator which helps prevent damage to the batteries
from excessive discharge. Verify the AC power is present at the
charger, the charger is on and charging (Red LED is illuminated).
The charger should shut off (Green LED) when the batteries charge
to 29.0 VDC. If the batteries cannot “hold a charge” replace them.
ALERT No AC POWER Chirps once whenever the
gate reaches the close limit
AC power is shut off at the source (breaker) or is not connected. The
operator’s AC power switch is turned off or the main circuit breaker
has tripped.
• Have a licensed electrician check the wiring.
• Connect AC power to the operator.
• Reset circuit breaker at the electrical panel.
• Reset the operator circuit breaker.
• Turn AC power switch on.
ALERT !ACTION BLOCKED
PHOTO EYE CLOSE
PEC
5 chirps indicating that the
command cannot be initiated
Photo eye is not recognized as active.
• Clear photo eye path
• Realign photo eye. Refer to Photo Eye Alignment Feature. on
page 104.
• Replace photo eye battery
• Check N.C. wiring (verify wires are not disconnected or shorted)
• Review wiring diagrams. Especially path to SENSOR COM
• Make sure SENSOR settings S1, S2, and S3 are correctly assigned.
Refer to External Entrapment Protection Sensors: What the
Installer Needs to Do on page 27.
ALERT !ACTION BLOCKED
PHOTO EYE OPEN
PEO
5 chirps indicating that the
command cannot be initiated
Photo eye is not recognized as active.
• Clear photo eye path
• Realign photo eye. Refer to Photo Eye Alignment Feature. on
page 104.
• Replace photo eye battery
• Check N.C. wiring (verify wires are not disconnected or shorted)
• Review wiring diagrams. Especially path to SENSOR COM
• Make sure SENSOR settings S1, S2, and S3 are correctly assigned.
Refer to External Entrapment Protection Sensors: What the
Installer Needs to Do on page 27.
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