User manual LG GR-526ZMQ

[. . . ] OPERATION DESCRIPTION 7-1 Outline of Air Conditioner Control 7-2 Description of Operation Circuit 7-3 ECO Mode 7-4 Hi POWER Mode 7-5 High-Temperature Limit Control 7-6 Low-Temperature Limt Control 7-7 Defrosting Operation 7-8 Auto Restart Function 7-9 Filter Check Lamp ­1­ TCTC Service Manual 18/24UKHP-ES (EN) File No. INSTALLATION PROCEDURE 8-1 8-2 8-3 8-4 8-5 Safety Cautions Installation Diagram of Indoor and Outdoor Units Installation Indoor Unit Outdoor Unit 8-6 Others 9. TROUBLESHOOTING CHART 9-1 9-2 9-3 9-4 9-5 9-6 9-7 9-8 9-9 Troubleshooting Procedure Basic Check Items Primary Judgement Self-Diagnosis by Remote Control (Check Code) How to Diagnose Faulty Part Troubleshooting for Indoor Unit Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire) Troubleshooting for P. C. Board Troubleshooting for Remote Control 10. [. . . ] Open fully the valve stem of the packed valves (both side of Gas and Liquid). Remove the charging hose from the service port. Securely tighten the caps on the packed valves. Compound pressure gauge -101kPa (-76cmHg) Pressure gauge Ø6. 35 mm Ø9. 52 mm Ø12. 7 mm 16 to 18 (1. 6 to 1. 8 kgf·m) 33 to 42 (3. 3 to 4. 2 kgf·m) 50 to 62 (5. 0 to 6. 2 kgf·m) · Tightening torque of flare pipe connections Pressure of R410A becomes higher than that of R22. 1. 6 times) Therefore, using a torque wrench, tighten firmly the flare pipe connecting sections which connect the indoor and outdoor units up to the specified tightening torque. Incorrect connections may cause not only a gas leakage, but also a trouble of the refrigeration cycle. Flare at indoor unit side Flare at outdoor unit side Fig. 8-5-4 Half union Flare nut Externally threaded side Use a wrench to secure. Internally threaded side Use a torque wrench to tighten. Handle Lo Charge hose (For R410A only) Connecting pipe Manifold valve Handle Hi (Keep full closed) Charge hose (For R410A only) Fig. 8-5-5 CAUTION · KEEP IMPORTANT 4 POINTS FOR PIPING WORK (1) Take away dust and moisture (Inside of the connecting pipes. ) (2) Tight connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using VACUUM PUMP. (4) Check gas leak (connected points) Vacuum pump adapter for counter-flow prevention (For R410A only) Vacuum pump Packed valve at gas side Service port (Valve core (Setting pin)) Packed valve at liquid side Fig. 8-5-6 ­ 41 ­ TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006 TO CHARGE REFRIGERANT Refrigerant No need to charge refrigerant Need to charge refrigerant RAS-24UKHP-ES/24UAH-ES GR-526ZMQ/18UAH-ES RAS-18UKP-ES/18UA-ES RAS-24UKP-ES/24UA-ES 8-5-4. Check that the indoor and outdoor units have been or not there are faulty parts following 9-4. Selfproperly connected with terminals assigned the same Diagnosis by Remote Control. If the connectors are not properly connected, the outdoor unit will not operate nor mally, or 9-2. Basic Check Items OPERATION lamp and TIMER lamp will blink (5Hz). Program Control The line voltage must be AC 220-240V. If it is not within The microcomputer operates as shown in Table 9-2-1 to this rage, the air conditioner may not operate normally. If there are any operational problems, check whether or not the problems correspond to Table 9-2-1. If they correspond to the Table, they are not problems with the air conditioner, but they are indispensable operations to control and maintain the air conditioner properly. 1 Operation of Air Conditioner Descriptions 2 3 4 5 6 7 8 9 10 11 When the main power supply is turned The OPERATION lamp blinks to indicate that power is turned on, the OPERATION lamp on the indoor on. If the [START/STOP] button is pressed, the lamp stops blinking. The lamp also blinks when the power supply is turned unit blinks. [. . . ] 402 403 404 Part No. Description Location No. 405 406 407 410 Part No. Description 43T60002 Terminal Block, 3P 3P AC300V, 20A 43T69004 Sensor, Heat Exchanger 10k, 25°C 43T69005 Sensor, Thermostat 10k, 25°C 43T69066 P. C. Board ASSY, WRS-LED MCC-819 43T69064 P. C. Board ASSY MCC-821 43T62003 Clamp, Cord ­ 68 ­ TCTC Service Manual 18/24UKHP-ES (EN) File No. [. . . ]