Parts/Service for Multi-Inverter Type

Parts/Service for Multi-Inverter Type

Brand: LG logo LG

Category: Air Conditioner

Document Type: Parts/Service

Language: EN

Uploaded: Nov. 21, 2025, 8:48 p.m.

Manual Publish Date: 2008-04-01

Warranty Information

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Part 2 Functions & Controls

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2. Air flow

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  • 2.1 Auto swing (left & right): Horizontal airflow direction control allows automatic swinging or fixing to a desired direction.
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  • 2.2 Auto swing (up & down): Vertical airflow direction control allows automatic swinging or fixing to a desired direction.
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  • 2.3 Chaos swing (up/down): Upper/lower vane automatically operates with chaos swing or can be fixed.
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  • 2.4 Air flow step: 6 steps for indoor fan motor control (LL, L, M, H, SH, Auto).
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  • 2.5 Chaos wind (auto wind): Random operation of high, medium, or low speed for 2-15 sec.
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  • 2.6 Jet Cool Mode Operation: Operates at super-high fan speed for 30 min. in cooling mode, setting temperature to 18°C.
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  • 2.7 Swirl wind Swing: Diagonal louvers open wider for comfort cooling/heating.
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3. Air purifying

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  • 3.1 PLASMA Air Purifying System: Removes contaminants, dust, mites, pollen, and pet fur. Filter is washable.
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4. Installation Functions

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  • 4.1 E.S.P. (External Static Pressure) Setting: Allows adjustment of E.S.P. through selectable modes (Without Zone System, With Zone System). Procedures for setting are provided.
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Troubleshooting and error codes

Display code Title Cause of error Check point & Normal condition
23 DC Link Low voltage • DC Link volt is below 300V • Check the TAB1 is connect.
• At not operating : DC Link voltage(260V ↑)
• At Comp operating : DC Link voltage(500V ↑ )
25 Input voltage Abnomal Input Voltage (R,S,T -N/140Vac↓, 300Vac ↑) Check the power source.
• Check the components.
26 DC Compressor Position • Compressor Starting fail error • Check the connection of comp wire "U,V,W”
• Malfunction of compressor
• Check the component of “IPM", detection parts.
32 D-pipe (Inverter) temp. high (105°C) • Discharge sensor (Inverter) temp. high • Check the discharge pipe sensor for INV.
• Check the install condition for over load.
• Check the leakage of refrigerant.
• Check the Service Valve open.
• Check the outdoor fan.
39 Transmission Error Between (PFC Micom → INV Micom) Communication Error Between PFC Micom and INV Micom. 1. Micom defect/Circuit defect
2. Different Micom S/W Version
3. ODU inverter PCB assembly damage
40 C/T Sensor Error • Initial current error • Malfunction of current detection circuit.
(Open / Short)
• The voltage of "C01N" Is 4.0Vdc(25A) .
• Check CT Sensor output voltage : 2.5Vdc ±5%
41 D-pipe sensor (Inverter) • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 200ΚΩ / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
44 Air sensor • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 10ΚΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
45 Condenser Pipe sensor • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 5ΚΩ / at 25°C (Unplugged)
• Normal voltage: 2.5Vdc / at 25°C (plugged)
46 Suction Pipe sensor • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 5ΚΩ / at 25°C (Unplugged)
• Normal voltage: 2.5Vdc / at 25°C (plugged)
47 D-pipe sensor (Constant) • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 200ΚΩ / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
65 Heat sink sensor • Open / Short
• Soldered poorly
• Internal circuit error		 • Normal resistor : 10ΚΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
51 Over capacity • Over capacity • Check the indoor unit capacity.
• Check the combination table.
60 Over capacity • Check sum error • Check the PCB ASM P/No.
• Check the poor soldering.
54 3-phase wrong wiring of main outdoor unit • 3-phase wrong wiring of outdoor unit (Reverse Phase /omission of phase) • Abnormal Main PCB
• No connection of CN_Phase
• Changed R, S, T connection order
61 Condenser pipe sensor temp. high • Condenser pipe sensor detected high temp.(65°C) • Check the load condition.
• Check the sensor of Condenser pipe sensor.
62 Heat sink sensor temp. high • Heat sink sensor detected high temp.(85°C) • Check the Heat sink sensor (10kΩ ±10% at 25°C)
• Check that outdoor fan is driving rightly
67 Outdoor fan lock • Outdoor fan is not operating • Check the fan condition.
• Check the fan connector
• Check the fan control part of the INVERTER PCB
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