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Try this : Start the unit using the remote control, after that push the C button
of remote control if C display at the unit then off the unit and plug
out the power supply. Then plug in again and "on" the unit using the
I recently purchased a Schumaker 410/820 watt inverter. I immediately hooked it up to a brand new deep cell batery I had purchased just prior to receiving this inverter. I plugged in several devices to make sure the inverter worked and to get some idea of what devices I can expect this unit to handle. I noticed that the fan only ran when I plugged in a device that drew a certain amount of power from the unit. I also plugged in a CPAP unit to make sure the inverter would operate the unit properly, and noticed that the CPAP only drew 38 to 40 watts of power and the cooling fan on the converter never came on. When I plugged in an oscillating fan it drew around 128 watts from the converter and the cooling fan immediately came on when I turned the fan on. Based on that, I would assume that the cooling fan in the converter only runs when there is enough power being drawn through the inverter to cause the inverter to heat up enough to cause possible damage to or failure of the inverter. I haven't taken the time to find out the power draw at which the cooling fan will run. Hope this helps.
Sounds like the compressor may be overheating. You need to check the outdoor condenser coil it may be stopped up with dirt, in turn, overheating the compressor. The condenser coil looks like a radiator and the outdoor fan blows through it, in a sense releasing the hot air from the building. If the coil is stopped up, it can not release the heat. You can wash this coil out with a hose and sprayer. Just be careful not to get the motor wet and be sure to shut off power.
I had the exact same problem with Sirius radios. I bought two Kenwood DTS-7000S receivers and both were sent back for warranty. Of the two, they only fixed one but by the time I figured out the other was bad, it was out of warranty. Kenwood, along with the repair community state they do fix such units, they toss them out. The thing that gets hot hot hot is the part that receives the Sirius antenna inside your unit. If you're like me and have nothing to lose then I recommend doing some cutting with a dremel and adding a small computer fan. It just takes a light breeze to keep that part cool enough (but it does take some sort of breeze, convection is out). For a home unit, find an old A/C power supply and match it to an old computer fan of equal or less voltage. For car, find a fan that uses 12 volts or less. It's an easy fix, really!
Hi. The unit is overheating, and in most cases, depending on the car model, you will be able to fit a computer-like cooling fan underneath the receiver pointing outwards in order to help the unit cool down a little better, and prolonging the unit's operation. Usually a double-din aperture is just perfect for these improvements. If your radio mount is a single-din opening, then is gonna be a pain in the back to do something about it. Narrow spacing means overheating, especially when heat doesn't have anywhere to go, packing in the system, ergo, shutting it down for conservational reasons. Go to you nearest car audio store. They'll be able to help you out.
Here is the proceedure to replace the lamp and reset the lamp hours.
Lamp Replacement Procedure:
1. Press the POWER button to turn off the power.
2. Wait for about 1 minute until the cooling fan stops.
The lamp cooling fan will continue to operate for about 1
minute after the power is turned off. Do not unplug the AC
Cord from the outlet until the fan has stopped. Avoid
interrupting the power by using circuit breakers or switchable
3. After the cooling fan has stopped, unplug the AC Cord from
Please wait more than one hour before replacing the lamp.
[ Forced cooling function ]
If you need to replace the lamp more urgently:
- The Projection display has a forced cooling feature.
After the POWER button is turned OFF, and during the
first minute of the normal cooling fan operation, press
the VOLUME UP button on the unit and CH UP key on
the remote at the same time for more than 5 seconds.
The cooling fan operates for about 10 minutes. (LAMP
LED will flash 5 times every 5 second and POWER LED
will flash red for 10 minutes.)
4. Remove the Front Cover Unit from the latches.
5. Turn the Knob to the left.
6. Pull the Lamp Cover out.
7. Loosen the Screw on the Lamp. Then, pull the Lamp.
Because the Lamp may still be hot, use caution when
8. Install the new Lamp, and tighten the Screw.
9. Install the Lamp Cover, and turn the Knob to the right.
10. Install the Front Cover Unit.
Lamp Time Reset Procedure:
Be sure to reset the Lamp time to "0" after replacing the new
1. Plug in the AC Cord, and turn on the power by pressing the
2. Press and hold the VOLUME DOWN button on the unit and
the SPLIT key on the remote together for over 5 seconds
in power on condition.
When the reset is finished, the display will indicate that the lamp hrs have been reset to 0 and the LAMP LED goes out.
Start the unit and press the remote control at C if the display in the unit displays C, then turn off the unit using the remote control and plug out the ac supply. Plug the unit again and using the remote control turn on the unit. If the E4 still display there is something wrong with your air in sensor or the main board itself. Replacement of this parts needs a qualified technician.