The EdgeStart unit is showing "E7" and won't turn

SOLVED: Error E7 in zamil split ac

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Aug 9, 2021 - Zamil 2 ton non inverter split type e7 error what is the problem !? ... There is a mode conflict. Some units are calling for heat and one is calling for cooling.

Zamil split type ac 07 error code showing
Apr 10, 2020
SOLVED: Zamil 2 ton non inverter split type e7 error what
Oct 25, 2022
SOLVED: Zamil ac i need total error codes
Aug 30, 2019
ZAMIL split a/c error code E8 (unit model MMZ36CHXAD
Aug 19, 2021
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For proper understanding of the error meainig it is necessary to obtain a Subcode of the error by pressing START at the moment of displaying error. E7-02 and E7-16 means Laser unit problems, E7-01 problem with memory, E7-10,11,12 Scanner problems

E7 i= "External Feedback Problem" which is a communication problem. There is a cable from the outdoor unit to the indoor unit ,check that cable is secured to the unit,check connections for tightness.
Here is the manual including instructions.
http://www.acwholesalers.com/EasyEditor/assets/amcor%20duo%20uchw-h12%20owners%20manual.pdf

E7-10 Shading trouble (Black correction)
The CCD black scan level is abnormal when shading. Improper connection of the CCD unit flat cable CCD unit abnormality MCU PWB abnormality. http://www.printcopy.info/?l=en&mod=free&chap=erc&brand=Sharp&model=AR5320

upon on extra research I've found that this problem was once solved by tightening any loose panels and screws...

Thread Sharp ar5320 error code e7

I had the same problem with my E7, but after removing and replacing the battery it was fine. If you've already tried holding the power button down for 10 seconds then you'll need to follow the guide below..

E7-11 Shading troble(whife correction)
IMPRPER CONNECTION OF THE CCD UNIT CABLE DIRT ON THE MIRROR,THE LENS,AND THE REFERANCE WHIT PLATE
copy lamp lighting abnormality
ccd unit abnormality
MCU PWB abnormality
(when occurred in the scan position)improper installation of the mirror unit

The E7 Error Code, indicates that the front cover of the unit it no properly in place and making contact with it's removal sensors. Remove and reinstall front cover properly. Be sure to turn the Master ON/OFF Switch to OFF and unplug unit before attempting this.


Hope this helped you solve the problem.

p.c.b feed bak signals is failed.probably,,temperature sensor or fan motor signal.

E7 00 Content ICU communication trouble (ICU
detection)
Detail Communication setup error,
framing/parity/protocol error
Cause Slave unit PWB connector improper
connection
Slave unit PWB – ICU PWB harness
trouble
Connector pin breakage of the motor
PWB of the slave unit PWB
Slave unit ROM trouble. no ROM, ROM
reverse insertion, ROM pin breakage

E7 codes deal with the optical scanner unit and or the laser unit. It could also be the lamp in the scanner unit. The E7 is the main code. There is a sub code associated with it. To view the sub code hold down the start button. Below is a list of specific codes and their meanings:
E7-02: LSU trouble
E7-10: Shading trouble (Black Correction)
E7-11: Shading trouble (White Correction)
E7-12: Shading Trouble
E7-16: Abnormal laser output
If it is a laser (LSU) issue then the LSU may need replacing.
If it is a shading error the first step is to remove the platen glass carefully (with the power off because the inverter board). There is a thin white strip on the bottom side of the platen next to the slit glass. Clean this white strip with a soft cloth and a small amout of isopropyl alcohol.
Dust on the optics can also cause shading reference errors so gently blow off the mirrors with canned air.
Perform the following key procedure to reset error:
"#" key, Interrupt key, "C" key, Interrupt key
"1" key, "4"key
Start key, "CA" key.
See if unit cycles and comes back up. If not turn off and then back on the main power.
If error reappears on site technical service may be required.