Control panel randomly beeps during filter/heating/standby modes with no LED readout codes. Reset unit no help. What to do?

14.2.2 To Make a Diagnosis1 Timer LED starts to blink and the unit automatically stops the operation.
2 Press the CHECK button on the remote control continuously for 5 seconds.
3 "- -" will be displayed on the remote control display.
Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4 Press the TIMER ? or ? button on the remote control. The code "H00" (no abnormality) will be displayed
and signal will be transmit to the main unit.
5 Each press of the button (? or ?) will increase error code
number and transmit error code signal to the main unit.
6 When the latest abnormality code on the main unit and
code transmitted from the remote control 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 unless
pressing the CHECK button continuously for 5 seconds or
operating the unit 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.
Diagnosis
display Abnormality / Protection control Abnormality
Judgement Emergency operation Primary location to verify H00 No abnormality detected - Normal operation H11 Indoor / Outdoor abnormal communica
tion > 1 min after starting
operation Indoor fan operation
only • Internal / external cable connections
• Indoor / Outdoor PCB H14 Indoor intake air temperature sensor
abnormality Continue for 5 sec. - • Intake air temperature sensor (detec
tive or disconnected) H15 Outdoor compressor temperature sensor
abnormality Continue for 5 sec. - • Compressor temperature sensor
(detective or disconnected) H16 Outdoor Current Transformer open cir
cuit - - • Outdoor PCB
• IPM (Power transistor) module H19 Indoor fan motor mechanism locked 7 times occurance
continuously - • Indoor PCB
• Fan motor H23 Indoor heat exchanger temperature sen
sor abnormality Continue for 5 sec. O
(Cooling only) • Heat exchanger temperature sensor
(detective or disconnected) H24 Indoor heat exchanger temperature sen
sor 2 abnormality Continue for 5 sec. - • Heat exchanger temperature sensor
(detective or disconnected) H27 Outdoor intake air temperature sensor
abnormality Continue for 5 sec. O • Outdoor temperature sensor (detec
tive or disconnected) H28 Outdoor heat exchanger temperature
sensor abnormality Continue for 5 sec. O • Outdoor heat exchanger temperature
sensor (detective or disconnected) H30 Outdoor discharge air temperature sen
sor abnormality Continue for 5 sec. - • Outdoor temperature sensor (detec
tive or disconnected) H33 Indoor / Outdoor wrong connection - - • Indoor / Outdoor supply voltage H38 Indoor / Outdoor mismatch (brand code) H50 Ventilation motor abnormality 7 times occurance
continuously - • Indoor PCB
• Ventilation motor H51 Nozzle lock abnormality 2 times occurance
continuously - • Nozzle H52 Limit switch abnormality - - • Indoor PCB H97 Outdoor fan motor mechanism locked 2 times occurance
within 30 minutes - • Indoor PCB
• Fan motor H98 Indoor high pressure protection - - • Air filter dirty
• Air circulation short circuit H99 Indoor heat exchanger anti-freezing pro
tection - - • Insufficient refrigerant
• Air filter dirty F11 Cooling / Heating cycle changeover
abnormality 4 times occurance
within 30 minutes - • 4-way valve
• V-coil F90 PFC control 4 times occurance
within 10 minutes - • Voltage at PFC F91 Refrigerantion cycle abnormality 2 times occurance
within 20 minutes - • No refrigerant
(3-way valve is closed) F93 Compressor rotation failure 4 times occurance
within 20 minutes - • Compressor F95 Cool high pressure protection 4 times occurance
within 20 minutes - • Outdoor refrigerant circuit F96 IPM (power transistor) overheating pro
tection 4 times occurance
within 30 minutes - • Excess refrigerant
• Improper heat radiation
• IPM (Power transistor) F97 Outdoor compressor overheating protec
tion 4 times occurance
within 10 minutes - • Insufficient refrigerant
• Compressor F98 Total running current protection 3 times occurance
within 20 minutes - • Excess refrigerant
• Improper heat radiation F99 Outdoor Direct Current (DC) peak detec
tion 7 times occurance
continuously - • Outdoor PCB
• IPM (Power transistor)
• Compressor

Note:
"O" - Frequency measured and fan speed fixed.
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until "beep" sound heard following by pressing the "CHECK" button at remote controller.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error Codes Table) by using remote controller or Auto Switch at indoor unit. However, the remote controller signal receiving sound is changed from one "beep" to four "beep" sounds.

The setup Security Code can be done when the
<Demonstration mode Setting> (page 50) is set as OFF.
• When the Security Code function is activated, the code
can’t be changed and the function can’t be released.
Note, the Security Code can be set as the 4 digit number
of your choice.
1 Enter Standby
Press the [SRC] button.
Select the "STANDBY" display.
2 Enter Menu mode
Press the [MENU] button for at least 1 second.
When "Menu" is displayed, "Security" is displayed.
3 Enter Security Code mode
Press the Control knob for at least 1 second.
When "Enter" is displayed, "Security" is displayed.
4 Select the digits to enter
Push the Control knob to [4] or [¢].
5 Select the Security Code numbers
Push the Control knob to [FM] or [AM].
6 Repeat steps 4 and 5, and complete the
Security Code.
7 Confirm the Security Code
Press the Control knob for at least 3 seconds.
When "Re-Enter" is displayed, "Security" is
displayed.
8 Do the step 4 through 7 operation, and
reenter the Security Code.
"Approved" is displayed.
The Security Code function activates.
• When the wrong Code is entered in steps 4 through 6,
repeat from step 4.
Press the Reset button and when it’s removed
from the battery power source
1 Turn the power ON.
2 Do the step 4 through 7 operation, and enter
the Security Code.
"Approved" is displayed.
The unit can be used.
In Standby mode
Touch Sensor Tone
Setting the operation check sound (beep sound)
ON/OFF.
Display Setting
"Beep : ON" Beep is heard.
"Beep : OFF" Beep canceled.
In Standby mode
Manual Clock Adjustment
• This adjustment can be done when the <Synchronize
Clock> (page 43) is set as OFF.
1 Select Clock Adjustment mode
Push the Control knob to [FM] or [AM].
Select the "Clock Adjust" display.
2 Enter Clock Adjust mode
Press the Control knob for at least 1 second.
The clock display blinks.
3 Adjust the hours
Push the Control knob to [FM] or [AM].
Adjust the minutes
Push the Control knob to [4] or [¢].
4 Exit Clock adjustment mode
Press the [MENU] button.
The Whole manual is here.
http://www.kenwood.net-disp.com/i/05products/kdc_x789/pdf/kdc_x889_x789_mp828_k_english.pdf

To display memorized error (Protective operation)
status:
1. Turn power on.
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. The power LED lights up. If no abnormality is
stored in the memory, three beeps sound will be
heard.
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 unless pressing the CHECK button continuously for 5
seconds or operating the unit for 30 seconds. 8. The same diagnosis can be repeated by turning
power on again.
• To clear memorized error (Protective operation) status after repair:1. Turn power on.
2. Press the AUTO button for 5 seconds (A beep
receiving sound) on the main unit to operate the unit
at Forced Cooling Operation mode.
3. Press the CHECK button on the remote controller for
about 1 second with a pointed object to transmit
signal to main unit. A beep sound is heard from main
unit and the data is cleared.
• Temporary Operation (Depending on breakdown status)
1. Press the AUTO button (A beep receiving sound) on
the main unit to operate the unit. (Remote control will
become possible.)
2. The unit can temporarily be used until repaired

Possibly, check error codes for problems:
• 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.

Hi Tania,
Have you gone through this checking sequence.? it's from a Panasonic a/c manual. It could be something as simple as a clogged filter. Once you have rectified the fault, you will probably have to clear the fault code as described at bottom below, before it will condescend to work again.
David

• Once error occurred during operation, the unit will stop its operation, and Timer LED blinks.
• Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again.
• In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored
  in IC memory.

14.2.2 To Make a Diagnosis

1. 1 Timer LED starts to blink and the unit automatically stops the operation.
2. 2 Press the CHECK button on the remote control continuously for 5 seconds.
3. 3 "- -" will be displayed on the remote control display.
   Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4. 4 Press the TIMER ? or ? button on the remote control. The code "H00" (no abnormality) will be displayed and signal will be transmit to the main unit.
5. 5 Each press of the button (? or ?) will increase error code number and transmit error code signal to the main unit.
6. 6 When the latest abnormality code on the main unit and code
   transmitted from the remote control 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. 7 The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5 seconds or operating the unit for 30 seconds.
8. 8 The LED will be off if the unit is turned off or the RESET button on the main unit is pressed.

14.2.3 To Display Memorized Error Code (Protective Operation)

1. 1 Turn power on.
2. 2 Press the CHECK button on the remote control
3. 3 "- -" will be displayed on the remote control display. Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4. 4 Press the TIMER ? or ? button on the remote control. The code "H00" (no abnormality) will be displayed
   and signal will be transmit to the main unit.
5. 5 Each press of the button (? or ?) will increase error code number and transmit error code signal to the main
   unit.
6. 6 When the latest abnormality code on the main unit and code transmitted from the remote control 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. 7 The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5
   seconds or operating the unit for 30 seconds.
8. 8 The same diagnosis can be repeated by turning power on again.

14.2.4 To Clear Memorized Error Code after Repair (Protective Operation)

1. 1 Turn power on (in standby condition).
2. 2 Press the AUTO button for 5 seconds (a "beep" sound is heard) on the main unit to operate the unit at Forced Cooling Operation Mode.
3. 3 Press the CHECK button on the remote control for about 1 second with a pointed object to transmit signal to
   main unit. A "beep" sound is heard, and the Error Code is cleared

Hi,
I have look up your unit, I found the thermostat located inside the back panel the would only take out the function to your elements in your oven.
High limit thermostat
This link shows its location and price of the part. Now for you display issue, before continuing, push and hold the clock button on the panel until you hear a beep, if the unit is set to Sabbath mode this will clear that. If not I will continue, by the way missing a version number to model number, like a number (0 or 02). Have you have a power outage recently? I am not locating any line fuses the would take the display out. If the clock doesn't reset then I would think about checking warranty or can your dealer to inquire on your warranty.
Control Unit
Good Luck and I hope this helps.

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

try to open the front panel, then look for the reset button inside the electronic board, then press it once. You will see all the LED lit randomly then press the test button. i hope this would help thanks.

Armstrong

FAILURE CODES

LED Status Fault Description
Off
No Power to the System Control

Steady Flash (11 or more flashes with no pause)
Normal Operation (Standby or call for heat)

2 Flashes
Pressure Switch Closed When It Should Be Open

3 Flashes
Pressure Switch Stuck Open 30 Seconds or Longer After Call for Heat (System in 5-minute delay mode before next call for heat). On/off switch in "off" position during a call for heat will generate this code.

4 Flashes
Open Limit Switch or Limit Switch Circuit

5 Flashes
Flame Sense Signal Sensed Out of Proper Sequence

6 Flashes - pause - 1 Flash (see Note 1)*
Soft Lockout Type 1 (Failure to light within 4 trials for ignition)

6 Flashes - pause - 2 Flashes (see Notes 1 & 2)*
Soft Lockout Type 2 (Flame sense lost during run)

6 Flashes - pause - 3 Flashes (see Notes 1 & 2)*
Soft Lockout Type 3 (Pressure switch opened during run)

6 Flashes - pause - 4 Flashes (see Notes 1 & 2)*
Soft Lockout Type 4 (Limit or limit circuit opened during run)

6 Flashes - pause - 5 Flashes (see Note 1)*
Soft Lockout Type 5 (Flame has gone away after Error Code 5)

6 Flashes - pause - 7 Flashes (see Note 1)*
Soft Lockout Type 7 (Self-check failure)

10 Flashes* - SV9520H8034 only
Line Input Voltage Polarity Reversed

there is a small button just to the right and under the control knob. Push and hold this button in standby mode. That will reset the unit. Once the unit is reset, you will need to set all of your other settings as well as the security code.

Once reset, press the SRC display until you are in standby mode. Now Press Enter. Code set should be displayed. using the control knob (Up, down left and right) set the security code. The unit will ask you to confirm this. Once you enter it twice, the unit will read "APPROVED." Now you can set your filters and other settings and enjoy!

Here is the troubleshooting guide for your unit. Hope this helps.

TROUBLE SHOOTING GUIDE
TROUBLESHOOTING
Symptom Remedy
1. Remote does not turn on system
- Check and replace remote batteries if the display fades while
any button is activated or no display is present. - Point remote towards IR receiver during transmission. 2. System does not turn on, no green LED & no beep
- Check wiring. (see "installation instruction")
- Check modular cable to receiver.
- Check diagnostic LED status in the upper unit control box.
3. System does not turn on even when receiver green LED is on.
- Low or over voltage condition, check diagnostic LED status in the upper unit control box.

4. Fan runs but no cold air.
- Evaporator temperature sensor reaches low limit, defrost mode.
- Check diagnostic LED status in the upper unit control box.
5. System runs continuously in the cool mode
- Remote was set for "I feel" mode and is left in a heated environment (sun etc.)
6. System runs continuously in the heat mode
- Remote was set for "I feel" mode and is left in a cool environment

1. Diagnostic LED (green)
(Note: Located on the control board in the upper unit control box.)
a) The LED is on when the 12VDC is adequate and communications are
present.
b) The LED is flashing fast and steady when in the freeze mode. Evaporator has frozen and the freeze proctection switch is engaged.
c) The LED is flashing slow and steady when the delay on break timer is
activated.
d) The LED is flashing 1 cycle on and off for one second with high or low
12VDC. Check the incoming 12VDC power for OK.
e) The LED is flashing 2 cycles on and off for one second with a
communication problem. Problem with the control board in the unit and the remote.

Hope this helps.

Jeff

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