LG AMNH076LQL0 Service Manual
Multi type air conditioner
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- Service manual (249 pages) ,
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- Product data (78 pages)
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LG
Multi Type Air Conditioner
SERVICE MANUAL
MODEL
Room Type
• Indoor Unit:
AMNH076LQL0
AMNH096LQL0
AMNH096LRL0
AMNH126LRL0
AMNH186LTL0
AMNH246LTL0
Art Cool Type
AMNH096AP*1
AMNH126AP*1
Art Cool Deluxe Type
AMNH076DZ*0
AMNH096DU*0
AMNH126DU*0
• Outdoor Unit: A2UW146FA0
A2UW146FA1
A2UW186FA0
A3UW186FA0
A3UW246FA0
A4UW246FA0
A4UW306FA0
A6UW406FA0
website http://www.lgservice.com
e-mail http://lgservice.com/techsup.html
Duct Type
AMNH096BTG0
AMNH126BTG0
AMNH186BTG0
AMNH096BPA0
AMNH126BPA0
AMNH186BHA0
AMNH246BHA0
AMNH306BGA0
AMNH366BGA0
CVT
AMNH096VEA0
AMNH126VEA0
AMNH186VBA0
AMNH246VBA0
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG
1 Way CST
AMNH096TCC0
AMNH126TCC0
4 Way CST
AMNH126TEC0
AMNH186TEC0
AMNH246TFC0
AMNH306TFC0
AMNH366TDC0
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Related Manuals for LG AMNH076LQL0
Summary of Contents for LG AMNH076LQL0
- Page 1 Multi Type Air Conditioner SERVICE MANUAL MODEL Room Type Duct Type 1 Way CST • Indoor Unit: AMNH076LQL0 AMNH096BTG0 AMNH096TCC0 AMNH096LQL0 AMNH126BTG0 AMNH126TCC0 AMNH096LRL0 AMNH186BTG0 4 Way CST AMNH126LRL0 AMNH096BPA0 AMNH186LTL0 AMNH126BPA0 AMNH126TEC0 AMNH246LTL0 AMNH186BHA0 AMNH186TEC0...
- Page 2 Troubleshooting Guide 2. A3UW246FA0, A4UW246FA0 Service Manual 159...
- Page 3 Troubleshooting Guide 3. A4UW306FA0 160 Multi type Air Conditioner...
- Page 4 Troubleshooting Guide 4. A6UW406FA0 Service Manual 161...
- Page 5 Troubleshooting Guide 5. BD Unit D Liquid(Ø9.52) C Liquid(Ø9.52 or Ø12.7) B Liquid(Ø9.52 or Ø12.7) A Liquid(Ø9.52 or Ø12.7) D Liquid(Ø6.35) C Liquid(Ø6.35) B Liquid(Ø6.35) A Liquid(Ø6.35) [Indoor Unit] 162 Multi type Air Conditioner...
- Page 6 Troubleshooting Guide Self-diagnosis Function Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table. •...
- Page 7 Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. Temp. difference : approx. 0°C All amount of refrigerant leaked out. Current : less than 80% of Check refrigeration cycle. rated current Temp.
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Page 8: Electronic Parts Troubleshooting Guide
Troubleshooting Guide Electronic Parts Troubleshooting Guide 1. A2UW146FA0, A2UW146FA1, A2UW186FA0, A3UW186FA0 ❇ Refer to electronic contorol device drawing & schematic diagram. The Product doesn’t operate at all. Trouble 1 Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. - Page 9 Troubleshooting Guide Product doesn't operate with the remote controller. Trouble 2 Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller.
- Page 10 Troubleshooting Guide The Compressor/Outdoor Fan are don't operate Trouble 3 Turn on the main power. Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least. When in air circulation mode, compressor/outdoor fan is stopped. Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.) When the sensor circuit for Indoor temperature and connector are in bad connection or are...
- Page 11 Troubleshooting Guide When indoor Fan does not operate. Trouble 4 Turn off main power. Check the connection of CN-FAN. Check the Fan Motor. Check the Fuse(AC250V, T2A). Check the related circuit of indoor Fan Motor. • The pin No. of micom and the part for driving SSR.(Q01M) •...
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Page 12: When The Louver Does Not Operate
Troubleshooting Guide When the louver does not operate. Trouble 5 • Confirm that the vertical louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the vertical louver with hands ⇒ Normal •... - Page 13 Troubleshooting Guide General Information Error Indicator (Indoor) • The function is to self-diagnosis air conditioner and express the troubles if there is any trouble. • Error mark is displayed on display window of indoor units and wired-remote controller, and LED of outdoor unit control board.
- Page 14 Troubleshooting Guide Error Indicator (Outdoor) Outdoor Error Ex) Error 21 (DC Peack) 2 Times 2 Times 2 Times LED01G (RED) 1 Sec. 1 Sec. 1 Sec. 1 Time 1 Time 1 Time LED02G (GREEN) 2 Sec. 2 Sec. LED02G Outdoor Error LED01G Contents...
- Page 15 Troubleshooting Guide Error Indicator (Outdoor) Outdoor Error LED02G Outdoor Error LED01G Contents Case of error (Green) Status code (Red) CT Circuit 4 times CT Circuit malfunction D-pipe sensor INV. (open/ short) 4 times 1 time Open / Short Air sensor (open/ short) 4 times 4 times Open / Short...
- Page 16 Troubleshooting Guide 1) Troubleshooting CH01, CH02, CH06 Display Title Cause of error Check point & Normal condition code • Open / Short Normal resistor : 10KΩ/ at 25°C (Unplugged) Indoor air sensor • Soldered poorly Normal voltage : 2.5Vdc / at 25°C (plugged) •...
- Page 17 Troubleshooting Guide 2) Troubleshooting CH03 Display Title Cause of error Check point & Normal condition code • Connection of wire Communication • Open / Short • Main PCB Volt. DC12V Wired R/C • Wrong connection • Noise interference Wired R/C Indoor Unit CN-REMO 12Vdc...
- Page 18 Troubleshooting Guide 3) Troubleshooting CH04 Display Title Cause of error Check point & Normal condition code • The connection of wire(Drain pump/ Float switch) • Drain pump power input. (220V) Drain pump • Float switch Open. • Drain tube installation. / Float switch (Normal : short) •...
- Page 19 Troubleshooting Guide 4) Troubleshooting CH05, CH53 Display Title Cause of error Check point & Normal condition code • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. Communication • Communication poorly •...
- Page 20 Troubleshooting Guide 5) Troubleshooting CH21 Display Title Cause of error Check point & Normal condition code • An instant over current in the U,V,W phase - Comp lock • Instant over current - The abnormal connection of U,V,W • Over Rated current DC Peak •...
- Page 21 Troubleshooting Guide 6) Troubleshooting CH22 Display Title Cause of error Check point & Normal condition code Malfunction of compressor Blocking of pipe Max. C/T Over current (14A ) Low voltage input Refrigerant, pipe length, blocked, … Malfunction of current detection circuit. (Open / Short) Initial current error Internal circuit...
- Page 22 Troubleshooting Guide 7) Troubleshooting CH23, CH28 Display Title Cause of error Check point & Normal condition code DC Link • Check the power source. • DC link volt. is Low voltage. • Check the components. 140Vdc . DC Link • DC link volt. is •...
- Page 23 Troubleshooting Guide 8) Troubleshooting CH24, CH25 Display Title Cause of error Check point & Normal condition code • Check the connection of “CN_Press”. • Low / High press Press S/W Open • Check the components. S/W open. • Abnormal Input voltage •...
- Page 24 Troubleshooting Guide 9) Troubleshooting CH26, CH27 Display Title Cause of error Check point & Normal condition code • Check the connection of comp wire “U,V,W” DC Compressor • Compressor • Malfunction of compressor Position position detect error • Check the component of “IPM”, detection parts. •...
- Page 25 Troubleshooting Guide 10) Troubleshooting CH32, CH33 Display Title Cause of error Check point & Normal condition code • Check the discharge pipe sensor for INV. D-pipe (Inverter) • Check the install condition for over load. • Discharge sensor temp. high •...
- Page 26 Troubleshooting Guide 11) Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Display Title Cause of error Check point & Normal condition code • Open / Short • Normal resistor : 200KΩ / at 25°C (Unplugged) D-pipe sensor (Inverter) • Soldered poorly •...
- Page 27 Troubleshooting Guide 12) Troubleshooting CH51, CH60 Display Title Cause of error Check point & Normal condition code • Check the indoor unit capacity. • Over capacity Over capacity • Check the combination table. Combination EEPROM • Check the PCB ASM P/No. •...
- Page 28 Troubleshooting Guide 13) Troubleshooting CH61, CH62 Display Title Cause of error Check point & Normal condition code Condenser • Condenser pipe sensor • Check the load condition. pipe sensor detected high • Check the sensor of Condenser pipe sensor. temp. high temp.(65°C) •...