354 Light Troubleshooting Chart

Symptom Probable Cause Check Solution
Light / fan do not function. ON / STANDBY switch is ON. Facility circuit breaker is tripped. Check facility circuit breaker. Reset circuit breaker.
Line fuse(s) blown. Inspect fuses. If replaced fuse blows, check incoming power.

Replace fuse(s).

Ceiling Mtd Lights

Wall Mtd. Lights

Mobile Lights: 120V or 230V

Contact certified electrician.
Fuse holder malfunctioning. Perform continuity check on fuse holder. Replace fuse holder.
ON / STANDBY switch malfunctioning. Perform continuity check on switch. Replace ON / STANDBY switch.
Transformer malfunctioning. With the ON / STANDBY switch ON, check for 20.82 +/-0.62 VAC across output leads of transformer. If proper voltage is not present, replace transformer.
Confirm power supply. If wired through florescent fixture can affect life of transformer. Correctly wire direct and replace defective transformer.
Check if customer has wired to a non-tested dimmer control. Correct dimmer and replace defective transformer.
Damaged / disconnected wiring in the arm assemblies. Perform continuity check on wiring from transformer to lighthead. Repair / replace any damaged or disconnected wiring. Wiring Diagrams
Light / fan do not function, or function intermittently when lighthead or arm assemblies are moved. Damaged / disconnected wiring in the arm assemblies. Perform continuity check on wiring from transformer to lighthead. Repair / replace any damaged or disconnected wiring. Wiring Diagrams
Symptom Probable Cause Check Solution
Light does not function. Fan functions properly. ON / STANDBY switch is ON. Incorrect bulb. Inspect and confirm 21V, 150W bulb Replace bulb.
Bulb is burned out. Inspect bulb. Replace bulb.
Damaged / disconnected wiring in the lighthead. Inspect wiring in lighthead. Repair / replace any damaged or disconnected wiring. Wiring Diagrams
Bulb socket corroded resulting in bad connection, or high resistance. Inspect / clean bulb socket. Replace bulb socket.
Symptom Probable Cause Check Solution
Fan does not function. Light functions properly. ON / STANDBY switch is ON. Damaged / disconnected wiring in the lighthead. Inspect wiring in lighthead. Repair / replace any damaged or disconnected wiring. Wiring Diagrams
Fan malfunctioning. Inspect fan. Also, check for heat damaged lenses.

Replace fan.

If necessary, replace lens(es).
Symptom Probable Cause Check Solution
Lighthead assembly illuminates, but not at the proper intensity. Incorrect bulb. Inspect and confirm 21V, 150W bulb Replace bulb.
Bulb malfunctioning. -
Wrong input tap is being used on transformer, or facility voltage has changed since installation. Check facility input voltage and transformer input tap being used. Select proper transformer input tap based on facility voltage.
Transformer malfunctioning With the ON / STANDBY switch ON, check for 20.82 +/- 0.62 VAC across output leads of transformer. If proper voltage is not present, replace transformer.
Bulb socket corroded resulting in bad connection, or high resistance. Inspect / clean bulb socket. Replace bulb socket.
Lenses are clouded, dirty, or damaged. Inspect lenses. Replace lenses.
Symptom Probable Cause Check Solution
Adjustment lever does not control brightness / beam size. Iris diaphragm malfunctioning. Inspect iris diaphragm. Replace iris diaphragm.
Iris diaphragm is rotating in optic housing. Check for loose screws holding optic housing to front cover. Re-align iris diaphragm(s).
Light out of balance due to missing sterilizable handle. If handle is in place. Install sterilizable handle adjust arm.
Not able to focus with lever. Missing lever and/or hardware. Replace missing lever and/or mounting hardware.
Symptom Probable Cause Check Solution
Cross tube can be rotated more than 580° in one direction. Ball pivot stop is broken. Inspect ball pivot stop. Replace ball pivot stop.
Lamp tube can be rotated more than 540° in one direction. Lamp tube pivot stop is broken. Inspect lamp tube pivot stop. Replace lamp tube pivot stop.
Lighthead can be rotated more than 180° in one direction. Lighthead pivot bearing stop is broken. Inspect lighthead pivot bearing. Replace lighthead pivot bearing.
Ceiling Mtd Lights only: Down tube can be rotated more than 580° in one direction. Main pivot stop is broken. Inspect pivot stop. Replace main pivot stop.
Wall Mtd Lights only: Fixed arm can be rotated more than 170° and collides with wall. Stop screw missing / broken. Inspect fixed arm stop screw. Replace fixed arm stop screw.
Symptom Probable Cause Check Solution
Cross tube rotates at ball pivot joint too stiffly, or drifts when released. Cross tube counterbalance out of adjustment. Release tension from ball pivot joint and observe to see if the cross tube counterbalances correctly.

Cross tube counterbalance adjustment, then perform, Ball pivot joint tension adjustment.
Ball pivot joint tension out of adjustment. Check for looseness / stiffness in joint.
Lamp tube does not rotate freely at cross tube, or drifts when released. Lamp tube brake tension out of adjustment. Check for looseness / stiffness in joint. Lamp tube brake adjustment.
Lighthead does not rotate freely at lamp tube, or drifts when released. Lighthead brake tension out of adjustment. Check for looseness / stiffness in joint. Lighthead brake adjustment.
Light out of balance due to missing sterilizable handle If handle is in place. Install sterilizable handle adjust arm.
Ceiling Mtd Lights only: Down tube does not rotate, or drifts when released. Improper installation of ceiling plate. Plate deflecting too much, or not level. Inspect ceiling plate. Check for level and excessive flexing. If ceiling plate is not level, readjust as necessary. If there is excessive flexing, support ceiling structure as necessary. Refer to installation guide.
Wall Mtd Lights only: Fixed arm does not rotate freely, or drifts when released. Improper installation of wall mount plate, or fixed arm not level. Inspect wall mount plate. Place a level on fixed arm. Adjust fixed arm leveling screws as necessary. Refer to installation guide.
Symptom Probable Cause Check Solution
Base moves when caster brakes are set. Caster brakes are worn or malfunctioning Inspect caster brakes. Replace brake caster(s) as necessary.
Base not moving freely. Broken caster. Condition of caster. Replace defective caster.
Dirt not allowing caster to rotate. Remove dirt and/or replace caster.