User Guide
Page 10
... not include a grounding slot, have a quaLifi_ eiectrician repiace the outtet _fore you use the room air conditioner. WARNING: Changing the outlet _thout making the appropriate wiring changes wili create an unsafe condition that could result in fire or eiectrical shock. P_ me_c WARNING: This appUance must _ p_pody g_unded, The power cord...
... not include a grounding slot, have a quaLifi_ eiectrician repiace the outtet _fore you use the room air conditioner. WARNING: Changing the outlet _thout making the appropriate wiring changes wili create an unsafe condition that could result in fire or eiectrical shock. P_ me_c WARNING: This appUance must _ p_pody g_unded, The power cord...
User Guide
Page 11
... slot in the receptacle for a proper po[ari_ connection. Ensure that the large s_ot in ,ac_dan_ with Ioca_ _'icel _ and _ulati,ons° Aluminum _se wiring may _ sp_a] _le_. _,sult a qual_ eiectt_an, _0,20,8, and 230/208 VOLT UN_ These uni_ ai_ _ip_d with a.thre_pro_g g_u_in,,g pl_g o_ the p_ s_pp_y... this can lead to poten_a_ safe_ h_ards, For temporary s_ua_ens,u_ only CSA _ied and UL listed 3-wi_ grmJr_ exten_ _tds, rated i5, A, i25V. N_ wiring sh_d _ m_e in the a_pter is _t preset, o_e m=_t _ [_sta|le_ by a q_alified _ the Na_ona_ Ele_ca| _e and $_1 cedee _nd ordinances...
... slot in the receptacle for a proper po[ari_ connection. Ensure that the large s_ot in ,ac_dan_ with Ioca_ _'icel _ and _ulati,ons° Aluminum _se wiring may _ sp_a] _le_. _,sult a qual_ eiectt_an, _0,20,8, and 230/208 VOLT UN_ These uni_ ai_ _ip_d with a.thre_pro_g g_u_in,,g pl_g o_ the p_ s_pp_y... this can lead to poten_a_ safe_ h_ards, For temporary s_ua_ens,u_ only CSA _ied and UL listed 3-wi_ grmJr_ exten_ _tds, rated i5, A, i25V. N_ wiring sh_d _ m_e in the a_pter is _t preset, o_e m=_t _ [_sta|le_ by a q_alified _ the Na_ona_ Ele_ca| _e and $_1 cedee _nd ordinances...
Service Manual
Page 2
... of Controls ...11 Disassembly ...12 Mechanical Parts...12 Air Handling Parts ...13 Electrical Parts ...14 Refrigerating Cycle...16 Schematic Diagram...19 Electronic Control Device ...19 Wiring Diagram...20 Components Location ...21 Troubleshooting Guide ...22 Piping System ...22 Troubleshooting Guide ...23 Electrical Parts Troubleshooting Guide ...25 Electric Parts ...29 Exploded View ...35...
... of Controls ...11 Disassembly ...12 Mechanical Parts...12 Air Handling Parts ...13 Electrical Parts ...14 Refrigerating Cycle...16 Schematic Diagram...19 Electronic Control Device ...19 Wiring Diagram...20 Components Location ...21 Troubleshooting Guide ...22 Piping System ...22 Troubleshooting Guide ...23 Electrical Parts Troubleshooting Guide ...25 Electric Parts ...29 Exploded View ...35...
Service Manual
Page 6
...TEMP CONTROL AIR DIRECTION CONTROL CONSTRUCTION PROTECTOR COMPRESSOR FAN MOTOR POWER CORD DRAIN SYSTEM NET WEIGHT OUTSIDE DIMENSION (W X H X D) (lbs/kg) (inch) (mm) LWHD1500ER LWHD1800R L1804R 1 115V 60Hz 15,000 1380 12.0 10.8 - 1 208/230V 60Hz 17,500/18,000 1800/1850 9.0/8.3 9.7/9.7 - - - - - 26.7(...REMOTE CONTROLLER THERMISTOR VERTICAL LOUVER (RIGHT & LEFT) HORIZONTAL LOUVER (UP & DOWN) SLIDE IN-OUT CHASSIS OVERLOAD PROTECTOR INTERNAL THERMAL PROTECTOR 3 WIRE WITH GROUDING ATTACHMENT PLUG (CORD-CONNECTED TYPE) DRAIN PIPE OR SPLASHED BY FAN SLINGER 126/57 25 31/32 X 16 27/32 ...
...TEMP CONTROL AIR DIRECTION CONTROL CONSTRUCTION PROTECTOR COMPRESSOR FAN MOTOR POWER CORD DRAIN SYSTEM NET WEIGHT OUTSIDE DIMENSION (W X H X D) (lbs/kg) (inch) (mm) LWHD1500ER LWHD1800R L1804R 1 115V 60Hz 15,000 1380 12.0 10.8 - 1 208/230V 60Hz 17,500/18,000 1800/1850 9.0/8.3 9.7/9.7 - - - - - 26.7(...REMOTE CONTROLLER THERMISTOR VERTICAL LOUVER (RIGHT & LEFT) HORIZONTAL LOUVER (UP & DOWN) SLIDE IN-OUT CHASSIS OVERLOAD PROTECTOR INTERNAL THERMAL PROTECTOR 3 WIRE WITH GROUDING ATTACHMENT PLUG (CORD-CONNECTED TYPE) DRAIN PIPE OR SPLASHED BY FAN SLINGER 126/57 25 31/32 X 16 27/32 ...
Service Manual
Page 7
... obliquely outward not to drain (consult a dealer). Install the unit with 4 (or 2) screws. The power cord must be grounded. 2. The green wire must be checked prior to an independent circuit. FOAM COOLED AIR 30-60" 1/4 Bubble Level AWNING FENCE HEAT RADIATION About 1/2" Over 20" Figure 1 ... (by pushing down and away from the fins to a single-outlet 15A circuit. (or 20A circuit for Electric Heater Model) 3. The green wire must be connected to shade the cabinet. 3. Select the most appropriate connection from among the following items are not blocked. 5. Plastic hose or...
... obliquely outward not to drain (consult a dealer). Install the unit with 4 (or 2) screws. The power cord must be grounded. 2. The green wire must be checked prior to an independent circuit. FOAM COOLED AIR 30-60" 1/4 Bubble Level AWNING FENCE HEAT RADIATION About 1/2" Over 20" Figure 1 ... (by pushing down and away from the fins to a single-outlet 15A circuit. (or 20A circuit for Electric Heater Model) 3. The green wire must be connected to shade the cabinet. 3. Select the most appropriate connection from among the following items are not blocked. 5. Plastic hose or...
Service Manual
Page 12
... that fastens the front grille.(See Figure 13) 3. Remove the cabinet. (Refer to section 1) 2. Remove the housing that connects PCB and motor wire in this manual and on page 22 in the control box. 7. Disassembly Disassembly - Remove the cabinet. 5. Remove the front grille. (Refer to...the cabinet at left cover of filter case and open the cover to the removal procedure, above . (Refer to the wiring diagram found on the control box.) TEMP MODE Cool COOL FAN En DRY Saevrgery INDOOR FAN HEAT DEFROST DFrayn Timer DESIRED FPFRFE32U1SENAHMRALSAIEUGOEYVTIRTDWRHFAEOGIRREYTR...
... that fastens the front grille.(See Figure 13) 3. Remove the cabinet. (Refer to section 1) 2. Remove the housing that connects PCB and motor wire in this manual and on page 22 in the control box. 7. Disassembly Disassembly - Remove the cabinet. 5. Remove the front grille. (Refer to...the cabinet at left cover of filter case and open the cover to the removal procedure, above . (Refer to the wiring diagram found on the control box.) TEMP MODE Cool COOL FAN En DRY Saevrgery INDOOR FAN HEAT DEFROST DFrayn Timer DESIRED FPFRFE32U1SENAHMRALSAIEUGOEYVTIRTDWRHFAEOGIRREYTR...
Service Manual
Page 20
... 5 DC PCB ASSEMBLY 6 AC PCB ASSEMBLY 7 THERMISTOR 8 PLASMA FILTER ASSY Q'TY PER SET 1 1 1 1 1 1 1 1 S: Service Parts N: Non Service Parts REMARKS S S S S S S S S 20 Room Air Conditioner Schematic Diagram Wiring Diagram 1 BK CN-MOTOR GN/YL BL (GN) MOTOR RD YL OR CN-AC/DC CN-AC/DC DC PCB ASSEMBLY RY-LOW RY-MED... THERMISTOR 6 DC12V SWITCH ZNR01J WH(BL) (Ribbed) FUSE 250V/T3.15A CN-12V BK(BR) (Plain) GN/YL (GN) R CN-HVB 3 RY-COMP 4 H.V. S C BL OLP WIRING DIAGRAM AC PCB ASSEMBLY 3854AR3563P 8 AIR FILTER ASSEMBLY LOCATION NO.
... 5 DC PCB ASSEMBLY 6 AC PCB ASSEMBLY 7 THERMISTOR 8 PLASMA FILTER ASSY Q'TY PER SET 1 1 1 1 1 1 1 1 S: Service Parts N: Non Service Parts REMARKS S S S S S S S S 20 Room Air Conditioner Schematic Diagram Wiring Diagram 1 BK CN-MOTOR GN/YL BL (GN) MOTOR RD YL OR CN-AC/DC CN-AC/DC DC PCB ASSEMBLY RY-LOW RY-MED... THERMISTOR 6 DC12V SWITCH ZNR01J WH(BL) (Ribbed) FUSE 250V/T3.15A CN-12V BK(BR) (Plain) GN/YL (GN) R CN-HVB 3 RY-COMP 4 H.V. S C BL OLP WIRING DIAGRAM AC PCB ASSEMBLY 3854AR3563P 8 AIR FILTER ASSEMBLY LOCATION NO.
Service Manual
Page 24
... fuse. Irregular motor resistance ( ). Irregular motor insulation ( ). Compressor only fails to start . Defect of power voltage. Improper wiring. Capacitor check. Fan only fails to start. Replacement of compressor (locking of fan motor. Improper wiring. Replacement of rotor, metal). Loose terminal connection. Replacement Improper thermostat setting. Troubleshooting Guide Fails to Start Check of...
... fuse. Irregular motor resistance ( ). Irregular motor insulation ( ). Compressor only fails to start . Defect of power voltage. Improper wiring. Capacitor check. Fan only fails to start. Replacement of compressor (locking of fan motor. Improper wiring. Replacement of rotor, metal). Loose terminal connection. Replacement Improper thermostat setting. Troubleshooting Guide Fails to Start Check of...
Service Manual
Page 26
... the Unit delay for 3 minutes? to RY-COMP again. 26 Room Air Conditioner YES • Check the RY-COMP. • Check the wiring Diagram. Is the wire connection of NO IC01M DC 12V? Possible Trouble 3 The compressor always operate. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. set lower ...NO Temp.-0.5°C? Is setting Temp. YES • Wait 3 Minutes. • Replace MAIN PCB Ass'y. YES • Check the RY-COMP. • Connect LEAD Wire to lower Number. Is the voltage No.10 NO of IC01M 0V? YES • Replace IC01M.
... the Unit delay for 3 minutes? to RY-COMP again. 26 Room Air Conditioner YES • Check the RY-COMP. • Check the wiring Diagram. Is the wire connection of NO IC01M DC 12V? Possible Trouble 3 The compressor always operate. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. set lower ...NO Temp.-0.5°C? Is setting Temp. YES • Wait 3 Minutes. • Replace MAIN PCB Ass'y. YES • Check the RY-COMP. • Connect LEAD Wire to lower Number. Is the voltage No.10 NO of IC01M 0V? YES • Replace IC01M.
Service Manual
Page 27
... key pushed once more from cool mode? Service Manual 27 YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram.
... key pushed once more from cool mode? Service Manual 27 YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram.
Service Manual
Page 30
YES • Check the RY-COMP. • Check the wiring Diagram. Is the wire connection of NO NO Is the Unit for 3 minutes IC01M DC 12V? Possible Trouble 3 The compressor always operate. YES • Select the desired Temp. to ... Is the voltage N0.9 of NO RY-COMP OK? set lower than Room NO Temp.-0.5°C? YES • Check the RY-COMP. • Connect LEAD Wire to lower Number. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is the voltage No.10 NO of IC01M 0V? YES • Replace IC01M...
YES • Check the RY-COMP. • Check the wiring Diagram. Is the wire connection of NO NO Is the Unit for 3 minutes IC01M DC 12V? Possible Trouble 3 The compressor always operate. YES • Select the desired Temp. to ... Is the voltage N0.9 of NO RY-COMP OK? set lower than Room NO Temp.-0.5°C? YES • Check the RY-COMP. • Connect LEAD Wire to lower Number. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is the voltage No.10 NO of IC01M 0V? YES • Replace IC01M...
Service Manual
Page 31
...? YES Is the connection of IC01M 0V? Service Manual 31 YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Troubleshooting Guide • Replace IC01M. • Replace IC01M. • Replace the battery. ••CChheecckk tthheePPCCBBpaptatettrenr.n. • Connect connector to CN-AC/DC exactly...
...? YES Is the connection of IC01M 0V? Service Manual 31 YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Troubleshooting Guide • Replace IC01M. • Replace IC01M. • Replace the battery. ••CChheecckk tthheePPCCBBpaptatettrenr.n. • Connect connector to CN-AC/DC exactly...
Service Manual
Page 33
...is open , or damaged. Test capacitor. Check bearings. Tighten it . If knocking sounds continue when running , replace motor. If not per wiring diagram, correct. Compressor will not rotate, replace the motor. If none, check power supply cord. Units using slinger ring for condenser fan must...5/16 inch clearance to Control Box. Check voltage. Check fan motor bearings; Pay attention to low speed. Check wire locations. Fan Turbo Loose clamper Worn bearings Voltage Wiring REMEDY Check voltage at outlet. Repair or replace loose terminal. Replace if not within ±10% of balance...
...is open , or damaged. Test capacitor. Check bearings. Tighten it . If knocking sounds continue when running , replace motor. If not per wiring diagram, correct. Compressor will not rotate, replace the motor. If none, check power supply cord. Units using slinger ring for condenser fan must...5/16 inch clearance to Control Box. Check voltage. Check fan motor bearings; Pay attention to low speed. Check wire locations. Fan Turbo Loose clamper Worn bearings Voltage Wiring REMEDY Check voltage at outlet. Repair or replace loose terminal. Replace if not within ±10% of balance...
Service Manual
Page 34
.... (If the compressor temperature is open or grounded, replace the compressor. if restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush. Capacitor Wiring Refrigerating system Insufficient cooling or heat- Check the capacitor. Replace if shorted, open . Check the compressor overload, if externally mounted. Clean the interior base before...
.... (If the compressor temperature is open or grounded, replace the compressor. if restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush. Capacitor Wiring Refrigerating system Insufficient cooling or heat- Check the capacitor. Replace if shorted, open . Check the compressor overload, if externally mounted. Clean the interior base before...