Operating manual for model no CU-E12LKR

Sounds like a faulty outdoor controller board. If you are in Australia, call Prime Electronics or Statewide Appliances for spares.
Part number: NPCWA743383

• To make a diagnosis
1. Timer LED start to blink and the unit automatically stops the operation.
2. Press the CHECK button on the remote controller continuously for 5 seconds.
3. "- -" will be displayed on the remote controller display.
Note: Display only for "- -". (No transmitting signal, no
receiving sound and no Power LED blinking.)
4. Press the "TIMER" or button on the remote controller. The code "H00" (no abnormality) will be displayed and signal will be transmitted to the main unit.
5. Every press of the button (up or down) will increase abnormality numbers and transmit abnormality code signal to the main unit.
6. When the latest abnormality code on the main unit and code transmitted from the remote controller are matched, power LED will light up for 30 seconds and a beep sound (continuously for 4 seconds) will be heard. If no codes are matched, power LED will light up for 0.5 seconds and no sound will be heard.
7. The breakdown diagnosis mode will be canceled by pressing the CHECK button continuously for 5 seconds or without any operation the remote control for 30 seconds.
8. The LED will be off if the unit is turned off or the RESET button on the main unit is pressed.

Or better yet, get a tech to check first.

Check this link to see if you can find the manual you are looking for here:
http://shop.panasonic.com/shop/model/36PEF1U6?t=specs

Check for power at the motor wires; check any connections from the motor back to the wall unit (if this is a "split" system...)

Not sure if yours has a letter 'H' before the 16 but if it does, it's the:
- Outdoor Current Transformer open circuit.
which means that your outdoor controller board is faulty.

Simple! Call your serviceman to service your unit completely, may be dead rat/squirrel would have been inside of indoor unit. After servicing , just gently spray room spray near return air. And run the unit.

http://www.panasonic.com/consumer_electronics/bp_split_ac/pdf/CS(CU)-C18(24)DKU_sm.pdf
Go to this site. It has your unit manual. Check it for part numbers and possible solution. Hope this helps.

Hi Wendy,
The manual for the unit is at this link. This should answer all your questions. http://panasonic.com.au/products/details.cfm?objectID=4601 then go to the bottom of the page and click on CS/CU-E18_21_24_28HKR Operation Manual

I take the time to answer you questions so please rate me
Thankyou
Mat

1.model no.
2.capacity of yr unit.
3 brand name.
mailme [email protected]
i can send to u

we have a old national air con cassette model cu-5chv11p , works for three days , then controller comes on e4 error ,and then switches off , and will not reset .

Try turning of the power to the unit.Wait 60 seconds and try it again.This may reset the unit.