Knoll Systems HD178 Red LED behavior and projector errors, Appendix, LED Behavior, Explanation

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The lamp housing is designed to contain these fragments, but use caution when removing the lamp housing. Before replacing the lamp, clean the lamp compartment and dispose of cleaning materials. Make sure to wash your hands after lamp replacement. This product has a lamp, which contains a very small amount of mercury. Dispose of it as required by local, state or federal ordinances and regulations. For more information see www.eiae.org.

7 Carefully remove the lamp housing. Dispose of the lamp in an environmentally proper manner.

8 Install the new lamp housing and tighten the screws.

9Re-attach the lamp connector to the projector.

The locking tab should engage when the connector is fully plugged in.

10 Replace the lamp door.

11 Replace the base or ceiling mount plate, if necessary.Service menu

12 Plug in the power cord and press the Power button on the remote or keypad to turn the projector back on.

13 To reset the lamp hour timer, navigate to the Settings>Service menu and select Reset Lamp Hours. See page 21 for details.

Appendix

Red LED behavior and projector errors

If the projector is not functioning properly and the LED is blinking red, consult Table 4 to determine a possible cause. There are two-second pauses between the blinking cycles. Visit Knoll System’s website for more details on the red LED error codes.

	Table 4: LED Behavior
Red LED Behavior	Explanation
	The lamp won’t strike after five (5) attempts. Check the lamp and lamp door installations for
One (1) blink	loose connections.
	The lamp counter hours have exceeded lamp life hours. Replace the lamp and reset the lamp
Two (2) blinks	hours counter.
	The projector has shutdown. Check to see if the lamp door is open. If the lamp door is closed,
Three (3) blinks	toggle off the projector and wait one minute and then toggle the projector on again. If the
	lamp does not strike after one minute, replace the lamp. Contact Technical Support (see page
	22) for repair if replacing the lamp does not solve the problem.
Four (4) blinks	The fan has failed. Contact Technical Support for repair or replacing the fan.
Five (5) blinks	The projector is overheating. Check for a blocked air vent. Contact Technical Support (see page
	14) for repair if clearing the air vents does not solve this problem.