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2708 47th Ave.
Sacramento, CA 95822-3806
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PAPI Troubleshooting


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Back to PAPI Data Sheet
PAPI (Style A) Troubleshooting
Very few problems will occur with your system. However, in the case of problems, the following pointers will help you locate and correct the problems. It is assumed that all interconnect wiring is good and that tilt switches are aligned and have continuity. Also, verify 50 or 60Hz power source for operation.
Symptom Likely Problem
CLASS I or CLASS II
Lamp 'OUT' Check lamp (if either lamp burns out, it would not shut off the other lamp).

PEC operation reversed
(dim in daylight)
Check wiring of PEC to TB3 (color coded red/blk/wht).

CLASS II ONLY!
Lamp still not 'ON' Temporarily short TB1B, R1-1 and R1-2, then R2-1 and R2-2. As each is tested, if the failed lamp turns 'ON', the heater resistor may have failed. Check for .5 ohm resistance - replace if required.

CLASS I or CLASS II
Lamps do not burn
(RTE-P21 mode light out)
Temporarily short Power Supply TB1 T-1 and TB1 T-2 and engage CB1. If system now functions, problem is either switches or tilt switch wiring. If problem is determined to be a particular tilt switch, readjust tilt switch by going through zero and then back.
DO NOT LEAVE JUMPER IN PLACE!

Light Box Alignment Footers not stable. Mounting hardware is not tight. Check floor flanges, nuts on frangible couplings, bolts & nuts on light box.
PAPI (Style B) Troubleshooting
Very few problems will occur with your system. However, in the case of problems, the following pointers will help you locate and correct the problems. It is assumed that all interconnect wiring is good and that tilt switches are aligned and have continuity.
Symptom Likely Problem
CLASS I or CLASS II
Lamp 'OUT' Check lamp (if either lamp burns out, it would not shut off the other lamp).

CLASS II ONLY!
Lamp still not 'ON' Temporarily short TB1B, R1-1 and R1-2, then R2-1 and R2-2. As each is tested, if the failed lamp turns 'ON', the heater resistor may have failed. Check for .5 ohm resistance - replace if required.

CLASS I or CLASS II
All lamps will not turn 'ON' L-880 System (four [4] box): Temporarily short TB1A, T-1 and T-2 on the MASTER unit. Only its lamps should be 'ON'. If not, check continuity of tilt switch. If OK, replace the MASTER control board. If the MASTER is OK, repeat the procedure on each SLAVE unit. If lamps energize in all OTHER units, replace THAT SLAVE control board. If problem is determined to be a particular tilt switch, readjust tilt switch by going through zero and then back.
DO NOT LEAVE JUMPER(S) IN PLACE!

Light Box Alignment Footers not stable. Mounting hardware is not tight. Check floor flanges, nuts on frangible couplings, bolts & nuts on light box.
PAPI (Style A) - Battery Supply (no tilt switch) Troubleshooting
Very few problems will occur with your system. However, in the case of problems, the following pointers will help you locate and correct the problems. It is assumed that all interconnect wiring is good.
Symptom Likely Problem
Lamp 'OUT' Check lamp (if either lamp burns out, it would not shut off the other lamp).

Lamp still not 'ON' Temporarily short TB1B, R1-1 and R1-2, then R2-1 and R2-2. As each is tested, if the failed lamp turns 'ON', the heater resistors may have failed. Check for .5 ohm (each) resistance - replace if required.

Lamps will not come on Check for a supply of +36 VDC on Circuit Breaker #1 and for +24 VDC on Circuit Breaker #2. Both should be present. If not, check battery supply.

Check continuity of the Contractor Relay's (CR1) coil. It should indicate approx. 280 ohms.

Check for continuity of Push Button Switch (SW1) when depressed.

If all of the above indicate OK, replace the RTE-P11 timer.


Light Box Alignment Footers not stable. Mounting hardware is not tight. Check floor flanges, nuts on frangible couplings, bolts & nuts on light box.
PAPI (Tipo B) Corrección de Fallos
Muy pocos problemas surgiran con su sistema. Sin embargo, en caso de problemas, los siguientes pasos le ayudará en ubicar y correjir los problemas; suponiendo que todo los cables de interconexión esten bien y que los interruptores inclinados esten alineados y tengan continuidad.
Síntoma Problema Probable
CLASE I o CLASE II
Lámpara 'fundida' Inspeccione la lámpara (si una de las lámparas se funde, no apagara la otra lámpara).

CLASE II SOLAMENTE
Lámpara todavía no se enciende Cause un corto temporal en el TB1B, R1-1 y el R1-2, después en el R2-1 y en el R2-2. Mientras cada uno este siendo examinado, si la lámpara que falla se enciende, el resistor del calentador debe haber fallado. Compruebe resistencia de .5 (ohm) - reemplace si es necesario.

CLASE I o CLASE II
Todas las lámparas no se encienden Sistema L-880 (de 4 unidades): Cause un corto temporal en el TB1A, T-1 y en el T-2 en la unidad principal. Solo sus lámparas deben estar encendidas. Si no es el caso, reemplace la tabla principal de control. Si la tabla principal esta bien, repita el procedimiento en cada unidad esclava. Si las lámparas se prenden en todas las otras unidades, reemplace esa tabla de control esclava.

Sistema L-881 (de 2 unidades): Cause un corto temporal en el TB1A, T-1 y en el T-2 en la unidad principal. Solo sus lámparas deben estar encendidas. Si no es el caso, reemplace la tabla de control principal. No es necesario hacer más pruebas; reemplace la tabla de control esclava.

NO DEJE LOS CABLES CONECTADOS

Alineación de unidad de iluminación Las bases no estan estables. La herramienta de montar no esta sujeta. Examine los flanges del suelo, las tuercas en los enganches frangibles, los cerrojos y las tuercas en la unidad de iluminación.

PAPI Wiring Connections

Tilt Switch Circuit
(WMV, 45MB)
Powering LHA 1
(WMV, 76MB)
Powering LHA 2
(WMV, 99MB)
Interruptor de inclinacion (Español)
(WMV, 46MB)
Alimentacion de la caja LHA 1 (Español)
(WMV, 77MB)
Alimentacion de la caja LHA 2 (Español)
(WMV, 100MB)

PAPI Troubleshooting
Tilt Switch Circuit
(WMV, 15MB)
LHA Alignment
(WMV, 53MB)


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