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Mrv system the problem in a caset type it give me ch02 indoor type temeperature thermistor error

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Your indoor thermistor has a open cicuit.replace it.

Posted on Oct 04, 2009

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Lg digital air cond show ch02 display


02 fault according to LG bible means that the indoor pipe sensor has failed. You will need to obtain a new sensor or get a Tech to supply and fit. The indoor unit needs to be accessed (Opened up) to repair this.

Dec 25, 2013 | Heating & Cooling

1 Answer

It shuts off and blinks 11


AHX18MEV
4 - 12
[8] SELF-DIAGNOSIS FUNCTION
1. Indoor unit
(AH-X18MEV, AH-X18MEV-1, AH-X24MEV, AH-X24MEV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The operation lamp (red), timer lamp (orange) and Super jet lamp lighter) flash to indicate the information of malfunction.
(Display of self-diagnosis result)
The operation lamp (red) and the Super jet lamp (green) flash in synchronization with the timer lamp (orange).
(AH-XP18MV, AH-XP18MV-1, AH-XP24MV, AH-XP24MV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The POWER CONSUMPTION indicator indicates the information of malfunction by showing the main category error (number) and the sub-category
error (-number) alternately in 1-second intervals.
Example: Compressor high-temperature error
Remark

3. CHART
<INDOOR UNIT> ?:1-second ON / 1-second OFF
Problem
symptom
Outdoor
unit indication
(LED1)
Indoor unit Malfunction
No.
Content of diagnosis Check point Action
Lamp Main Sub Main Sub
Normal
condition
Normal
blinking
? ? ? ? ? Timer (Orange) 0 0 Normal
Operation (Red)
Super Jet (Green)
Indoor and
outdoor
units do not
operate.
1-time ? ? ? ? ? Timer (Orange) 1 0 Outdoor unit
thermistor
short-circuit
Heat exchanger
thermistor short
circuit error
(1) Measure the resistance
of the outdoor
unit
thermistors.
(1) Replace the outdoor
unit thermistor
assembly.
? Operation (Red)
Super Jet (Green)
? ? ? ? ? Timer (Orange) 1 Outdoor temperature
thermistor
short circuit error
(2) Check the lead wire
of the outdoor unit
thermistor for torn
sheath and shortcircuit.
(2) Replace the outdoor
unit thermistor
assembly.
? Operation (Red)
? Super Jet (Green)
? ? ? ? ? Timer (Orange) 2 Suction thermistor
short circuit
error
(3) No abnormality
found in above
inspections (1) and
(2).
(3) Replace the outdoor
unit control
PWB assembly.
? Operation (Red)
? Super Jet (Green)
? ? ? ? ? Timer (Orange) 3 2-way valve
thermistor short
circuit error
? Operation (Red)
? ? Super Jet (Green)
LED1
AU-X24MV, AU-X24MEV
AU-X18MV, AU-X18MEV
LED1

May 27, 2012 | Sharp Heating & Cooling

1 Answer

Hi my LG healthplus inverter system split unit keep giving me a CH02 error code. how can i solve?


Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor

Jan 20, 2011 | LG Heating & Cooling

2 Answers

How to fix LG CH02 error


Indoor Pipe Sensor or Outdoor Sensor Assy fault, Open or Short. Disconnect from PCB and measure resistance. Air sensor = 10 kOhm at 25C, Pipe sensor = 5
kOhm at 25C. If not replace sensor

Jan 16, 2011 | LG Heating & Cooling

1 Answer

My LG Lan125HV works fine on air conditioning ( cool) but heat pump does not trigger when I move to heat or combined settings. Tried all temperature and fan settings, tried waiting to see if unit waiting...


I talked to LG customer support (800) 243-0000. The tech told me that this model had a problem with the indoor thermistor. It doesn't fail with an open-circuit condition, so you don't get an error code. The thermister just goes out of range and believes your indoor temp is much hotter than it is. That's why the heating never comes on. I'll bet that, even though it ran in COOLING mode, once your room reached setpoint, it just kept on cooling & cooling ... because the thermistor was still giving a false, high temp reading.

So, I bought a new thermistor, P/N 6323A20042A. My unit worked fine. Until the next week when I turned heating back on and now I have the same problem ... gives cooling but no heat. Something is failing the indoor thermistor OR the distributor sent me an old-style thermistor, I haven't gotten determination on that yet.

Regardless, call LG and see if they can't direct you to a distributor for an indoor sensor. LG's warranty coverage for parts is a royal pain, unless you can show a receipt by a certified installer, you're not going to have much luck getting payment for the part. However, the thermistor is only $10. Just hope you get one that doesn't fail on you!

Oct 22, 2010 | LG Heat cool Window Air Conditioner

1 Answer

Get a CH02 error. Can't get service. No response.


i have the lg lp120hed units as well. i had a unit give me ch02 error a while back i replaced the unit with a spare....now the spare is not working either.

looking at the manual, ch02 error means "indoor coil thermistor error"....calling lg for that part now.

good luck.

Apr 01, 2010 | LG LP120HED Wall/Window Air Conditioner

4 Answers

LG split (3 indoor) LMU360CE system. The fans on the outdoor unit start and work. The compressors do not start-up. There is no error code on the indoor unit. On the outdoor unit the error code...


02 Indoor In-Piping Error 2 times OFF

There is a complete guikde to problems on page 66 of users manual. If you dont have one get back to me with your email.

Aug 01, 2009 | LG LMU360CE/LMN120CE Air Conditioner

2 Answers

LG 3phase ducted CH02 fault (internal pipe thermistor error)- every day. When it comes up the air con shuts off, and takes a few hours to clear itself. Very annoying. I notice though it comes up less if i...


have u checked your low pressure and high pressure when compressor is on. Remember the compressor has a thermal protection switch if the compressor has too much freon the A.C will work for a while turn off, then turn then off and on. Are the air filters for the evaporator clean, is the blower fan blowing the correct way. How long ago did the evaporator coil got cleaned. With a properly cleaned filter and evaporator coil you can now check for pressures. Use your ammeter and check how much the compressor is pulling and compared it to the name plate. How much tons your A.C. If you give me how much tons and low and high readings I might help you diagnose the problem. Make sure the evaporator is clean blower blowing correct way condenser cleaned and condenser fan rotating the correct way

Jul 24, 2009 | Heating & Cooling

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