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Gree GUD100W/NhA-T, Owner'S Manual

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Owner's Manual 

Original Instructions 

Air Conditioners 

DC Inverter U-match Series Floor Ceiling Type Unit 

Models: 

Indoor Unit  

Outdoor Unit 

GUD35ZD/A-T 

GUD35W/NhA-T 

GUD50ZD/A-T 

GUD50W/NhA-T 

GUD71ZD/A-T 

GUD71W/NhA-T 

GUD85ZD/A-T 

GUD85W/NhA-T 

GUD100ZD/A-T 

GUD100W/NhA-T 

GUD100W/NhA-X 

GUD125ZD/A-T 

GUD125W/NhA-T 

GUD125W/NhA-X 

GUD140ZD/A-T 

GUD140W/NhA-T 

GUD140W/NhA-X 

GUD160ZD/A-T 

GUD160W/NhA-X 

Summary of Contents for GUD100W/NhA-T

Page 1: ...ng Type Unit Models Indoor Unit Outdoor Unit GUD35ZD A T GUD35W NhA T GUD50ZD A T GUD50W NhA T GUD71ZD A T GUD71W NhA T GUD85ZD A T GUD85W NhA T GUD100ZD A T GUD100W NhA T GUD100W NhA X GUD125ZD A T GUD125W NhA T GUD125W NhA X GUD140ZD A T GUD140W NhA T GUD140W NhA X GUD160ZD A T GUD160W NhA X ...

Page 2: ...leaning and user maintenance shall not be made by children without supervision 2 In order to ensure reliability of product the product may consume some power under stand by status for maintaining normal communication of system and preheating refrigerant and lubricant If the product is not to be used for long cut off the power supply please energize and preheat the unit in advance before reusing it...

Page 3: ...e product from time to time due to the reason of sales or production and reserve the right to revise the contents without further notice 7 Indoor unit must not be installed in a laundry 8 If the supply cord is damaged it must be replaced by the manufacturer its service agent or similarly qualified persons in order to avoid a hazard 9 Gree Electric Appliances Inc of Zhuhai assumes no responsibility...

Page 4: ...cturer 3 After verification the defect of product is directly caused by corrosive gas 4 After verification defects are due to improper operation during transportation of product 5 Operate repair maintain the unit without abiding by instruction manual or related regulations 6 After verification the problem or dispute is caused by the quality specification or performance of parts and components that...

Page 5: ...aults of the AC 55 5 2 Error Code 57 5 3 Unit Maintenance 59 5 4 Notice on Maintenance 63 5 5 After Sales Services 71 This marking indicates that this product should not be disposed with other household wastes throughout the EU To prevent possible harm to the environment or human health from uncontrolled waste disposal recycle it responsibly to promote the sustainable reuse of material resources T...

Page 6: ...iance or an operating electric heater PROHIBITED This sign indicates that the operation must be prohibited Improper operation may cause severe damage or death to people WARNING If not abide strictly it may cause severe damage to the unit or the people NOTICE If not abide strictly it may cause slight or medium damage to the unit or the people OBSERVED This sign indicates that the items must be obse...

Page 7: ...be grounded to avoid electric shock Do not connect the ground wire to gas pipe water pipe lightning arrester or telephone wire 2 The appliance shall be stored in a well ventilated area where the room size corresponds to the room area as specified for operation 3 The appliance shall be stored in a room without continuously operating open flames for example an operating gas appliance and ignition so...

Page 8: ... with protective measures against mechanical damage caused by accident 7 If the installation space for air conditioner pipe is too small adopt a protective measure to prevent the pipe from physical damage 8 During installation use the specialized accessories and components otherwise water leakage electric shock or fire hazard may occur 9 Please install the air conditioner in a secure place that ca...

Page 9: ...n resulting in injury 18 Only professionals are allowed to carry on daily maintenance 19 Before contacting any wire make sure power is cut off 20 Do not let any inflammable objects near the unit 21 Do not use organic solvent to clean the air conditioner 22 If you need to replace a component please ask a professional to repair with a component supplied by the original manufacturer so as to ensure t...

Page 10: ...leakage 7 Adopt proper measures to protect the outdoor unit from small animals because they may damage the electric components and cause malfunction of the air conditioner OBSERVED 1 If wired control is to be used it should be connected first before powering up the unit otherwise the wired control may not be able to use 2 When installing the indoor unit keep it away from television wireless waves ...

Page 11: ...DC Inverter U match Series Floor Ceiling Type Unit 6 2 Product Introduction 2 1 Overall Layout ...

Page 12: ...the hook on the cabinet of the unit 2 Wireless Controller Battery 1 2 To control the indoor unit 3 Insulation 1 To insulate the gas pipe 4 Insulation 1 To insulate the liquid pipe 5 Fastener 4 To fasten the sponge 6 Removal Proof Screw Nut 1 To connect gas pipe 7 Removal Proof Screw Nut 1 To connect liquid pipe Outdoor Unit Accessories No Name Appearance Q ty Usage 1 Drain Plug 1or 3 To plug the u...

Page 13: ...cking out in the applicable tables a For indoor unit confirm the model of indoor unit and check the corresponding table b For outdoor unit that is installed or placed indoors select the corresponding table according to the height of the room Height of the room Select the applicable table 1 8m Floor standing type 1 8m Wall mounted type 3 Refer to the following table to check out the minimum constru...

Page 14: ... 6 29 9 5 6 269 5 8 21 5 5 8 32 1 5 8 289 6 0 23 0 6 0 34 3 6 0 309 6 2 24 5 6 2 36 6 6 2 330 6 4 26 1 6 4 39 1 6 4 351 6 6 27 8 6 6 41 5 6 6 374 6 8 29 5 6 8 44 1 6 8 397 7 0 31 3 7 0 46 7 7 0 420 7 2 33 1 7 2 49 4 7 2 445 7 4 34 9 7 4 52 2 7 4 470 7 6 36 9 7 6 55 1 7 6 496 7 8 38 8 7 8 58 0 7 8 522 8 0 40 8 8 0 61 0 8 0 549 2 When installing an outdoor unit with single or double fans hold the ha...

Page 15: ...lace where the inclination is less than 5 3 Do not install the unit at a place with direct sunlight 4 Do not install the unit at a place with leakage of inflammable gas Selection of Installation Location for Indoor Unit Select a location pursuant to the following condition 1 Air inlet and outlet of the indoor unit should be away from obstacles to make sure the unit s air flow can reach the entire ...

Page 16: ...ors 2 Select a location that is safe and away from animals and plants If not please add safety fences to protect the unit 3 Install at a place with good ventilation Make sure the outdoor unit stays at a well ventilated place with no obstacles nearby that may obstruct the air inlet and outlet 4 The installation location should be able to withstand the weight and vibration of outdoor unit and allow ...

Page 17: ...ll not amplify sound or vibration 2 If the installation location is not strong enough the indoor unit may fall and cause injuries 3 If the job is done with the panel frame only there is a risk that the unit will come loose Please take care 1 Indoor Unit NOTICE Drilling of ceiling opening and installation of air conditioner must be performed by professionals Unit mm Dimensions Model A B C D H GUD35...

Page 18: ...del A B C D H GUD85ZD A T 1200 235 1142 318 665 GUD100ZD A T 1200 235 1142 318 665 GUD125ZD A T 1570 235 1512 318 665 GUD140ZD A T 1570 235 1512 318 665 GUD160ZD A T 1570 235 1512 318 665 2 Outdoor Unit GUD35W NhA T GUD50W NhA T GUD71W NhA T GUD85W NhA T A F D E G C B ...

Page 19: ...DC Inverter U match Series Floor Ceiling Type Unit 14 GUD100W NhA T GUD125W NhA T GUD140W NhA T GUD100W NhA X GUD125W NhA X GUD140W NhA X ...

Page 20: ...DC Inverter U match Series Floor Ceiling Type Unit 15 GUD160W NhA X ...

Page 21: ...A X 940 530 820 610 486 460 GUD125W NhA T 940 530 820 610 486 460 GUD125W NhA X 940 530 820 610 486 460 GUD140W NhA T 940 530 820 610 486 460 GUD140W NhA X 940 530 820 610 486 460 GUD160W NhA X 900 412 1345 572 378 340 3 1 4 Diagram of Unit Installation Space and Location 1 Diagram of installation space and location for outdoor unit Notice for best performance of the outdoor unit make sure its ins...

Page 22: ... 1000 A B C E 300 150 150 1000 D 1000 D E 1000 1000 B D Hb Hd Hd H 100 1000 Hb Hd Hd H 100 1000 B D E Hb Hd Hb 1 2 H 250 2000 1000 1 2 H Hb H 250 2000 1000 Hb H Prohibited Hb Hd Hd 1 2 H 100 2000 1000 1 2 H Hd H 200 2000 1000 Hd 1 2 H Prohibited 2 When two or more outdoor units are to be installed side by side ...

Page 23: ... 2000 D E 2000 1000 B D Hb Hd Hd H 300 2000 Hb Hd Hd 1 2 H 250 2000 1 2 H Hd H 300 2500 B D E Hb Hd Hb 1 2 H 300 2000 1000 1 2 H Hb H 300 2500 1000 Hb H Prohibited Hb Hd Hd 1 2 H 250 2500 1000 1 2 H Hd H 300 2500 1000 Hd 1 2 H Prohibited 3 When outdoor units are installed in rows 200 4000 200 2000 400 400 4500 2000 600 Hb H b ...

Page 24: ...stalled one above another Unit mm 400 500 2000 400 500 300 2 Diagram of installation location and space for indoor unit Notice for the best performance of indoor unit make sure its installation space conforms to the following installation dimensions 1 Install the unit at a place where is strong enough to withstand the weight of the unit ...

Page 25: ...nit where the drain pipe can be easily installed 5 The space from the unit to the ceiling should be kept as much as possible so as for more convenient service 3 2 Unit Installation 3 2 1 Indoor Unit Installation 3 2 1 1 Preparation for Installing the Indoor Unit 1 Dismantle the clasp in the left and right grille and take down the screws 2 Take down the fixed screws in the left and right side plate...

Page 26: ...remove the paper template 2 Insert the anchor bolts into the drilled holes and drive the pins completely into the anchor bolts with a hammer 3 Remove the right and left side panels 4 Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger to prevent the indoor unit from moving 5 Reinstall and tighten the right and left side panels ...

Page 27: ...Floor Ceiling Type Unit 22 Floor type Ceiling type Unit mm Nut Left side panel Right side panel Hanger 6 Adjust the height of the unit to make the drain pipe slant slightly downward so that the drainage will become much smoother ...

Page 28: ...es and causes noise please add rubber cushion between the outdoor unit and the installation base 4 When the outdoor unit is in heating or defrosting it needs to drain water When installing the drain pipe plug the accompanied drainage connector to the drainage hole on the chassis of the outdoor unit Then connect a drain hose to the drainage connector If drainage connector is used the outdoor unit s...

Page 29: ...t good and causes leakage the joints need to be cut and welded again for replacement The removal proof screw nut must be connected to the indoor unit Installation method Connect the connection pipes first to the indoor unit and then to the outdoor unit When bending a connection pipe be careful not to damage the pipe Do not over tighten the screw nut otherwise leakage will occur Besides the outside...

Page 30: ...85ZD A T GUD85W NhA T 50 25 GUD100ZD A T GUD100W NhA T GUD100W NhA X 65 30 GUD125ZD A T GUD125W NhA T GUD125W NhA X 75 30 GUD140ZD A T GUD140W NhA T GUD140W NhA X 75 30 GUD160ZD A T GUD160W NhA X 75 30 Connection pipe should adopt water proof insulating material Its wall thickness should be 0 5 1 0mm and the pipe wall should be able to withstand 6 0MPa The longer the connection pipe is the worse c...

Page 31: ...or unit Indoor unit System gas pipe Oil return bend Install an oil return bend every 6m 2 Outdoor unit is above the indoor unit It s necessary to add oil return bend and non return bend at the lowest and highest position of the vertical pipe as shown below Outdoor Outdoor unit unit Non return Non return bend bend System Systemgas gas pipe pipe Oil Oil return return bend bend Indoor Indoor unit uni...

Page 32: ...ection pipe should face downward Remove burrs with the cut surface so that the chips do not enter the pipe 3 Remove the cut off valve of outdoor unit and take out the flare nut from the bag of indoor unit accessories Then fit the flare nut on the pipe and use a flaring tool to flare the mouth of connection pipe 4 Check whether the flaring part has cracked see the figure below 3 2 3 3 Pipe Bending ...

Page 33: ...th adhesive tape 3 2 3 4 Connection Pipe of Indoor and Outdoor Units NOTICE Connect the pipe to the unit Please follow the instructions stated in the figures below Use both spanner and torque wrench When connecting the tapered screw nut first apply chilled machine oil on its inner and outer surface and then screw it up for 3 4 circles Confirm the tightening torque by referring to the following tab...

Page 34: ...w on the flare nut of the flaring connecting pipe on the outdoor unit valve The method of screwing the flare nut is the same with that for indoor unit Gas pipe Liquid pipe Pipe coupling or or 3 way valve 2 way valve 3 2 3 5 Thermal Insulation of Pipe Joint Only for Indoor Unit Stick coupler heat insulation large and small to the place where connecting pipes ...

Page 35: ...nnection pipe is passing through the knock off hole conduct sealing with insulated cotton in the knock off hole of outdoor unit to prevent small animals from entering See the following figure Notice Only for the GUD100W NhA T GUD125W NhA T GUD140W NhA T GUD100W NhA X GUD125W NhA X GUD140W NhA X GUD160W NhA X units 3 2 4 Connection Pipe Vacuum Pumping and Leak Detection 3 2 4 1 Vacuum Pumping NOTIC...

Page 36: ...100W NhA T GUD100W NhA X 30 GUD125W NhA T GUD140W NhA T GUD125W NhA X GUD140W NhA X GUD160W NhA X 45 And verify if the pressure gauge at the low pressure side of the manifold valve assembly reads 0 1MPa 750mmHg if not it indicates there is leak somewhere Then close the switch fully and then stop the vacuum pump 6 Wait for 10min to see if the system pressure can remain unchanged If the pressure dec...

Page 37: ...cuation 3 2 4 2 Leak Detection Methods The following leak detection methods are deemed acceptable for systems containing flammable refrigerants Electronic leak detectors shall be used to detect flammable refrigerants but the sensitivity may not be adequate or may need re calibration Detection equipment shall be calibrated in a refrigerant free area Ensure that the detector is not a potential sourc...

Page 38: ...azing process 3 2 5 Refrigerant Adding NOTICE Before and during operation use an appropriate refrigerant leak detector to monitor the operation area and make sure the technicians can be well aware of any potential or actual leakage of inflammable gas Make sure the leak detecting device is applicable to inflammable refrigerant For example it should be free of sparks completely sealed and safe in na...

Page 39: ...Condensate drain pipe should be connected into special drain system for air conditioner 3 2 6 1 Indoor Side Drainage Pipe 1 Keep piping as short as possible and slope it downwards at a gradient of at least 1 100 so that air may not remain trapped inside the pipe 2 Keep pipe size equal to or greater than that of the connecting pipe 3 Install the drain piping as shown and take measures against conde...

Page 40: ...ipe to the drain pipe and then tighten the clamp with tape Insulate the pipe clamp and the drain hose using heat insulation sponge Metal clamp Drain hose Grey tape Tighten the clamp until the screw head is less than 4 mm from the hose Metal clamp Insulation sponge 4 When drain hose requires extension obtain an extension hose commercially available 5 After connecting the local drain hose tape the s...

Page 41: ... to place the drain hose as shown in the diagram below in a downward sloping direction 3 2 6 3 Outdoor Side Drainage Pipe 1 If the outdoor unit is underneath the indoor unit arrange the pipeline according to the following diagram 1 Drain hose should be placed on the ground and its end should not be immersed into water The whole pipeline should be supported and fixed onto the wall 2 Wind the insula...

Page 42: ...e from bottom to top 2 The whole pipeline should be wound together to avoid water returning to the room 3 Use saddles to fix the whole pipeline onto the wall 3 2 6 4 Testing of Drain Piping 1 After piping work is finished check if drainage flows smoothly 2 As shown in the figure pour water into the drain pan from the right side to check that water flows smoothly from the drain hose ...

Page 43: ... electrical installation must be conducted by professionals in compliance with local laws and regulations and the instructions in this manual Never extend the power cord The electric circuit must be equipped with a circuit breaker and air switch both with sufficient capacity The unit s operating power must be within the nominal range stated in the instruction manual Use a specialized power circuit...

Page 44: ...rd communication cords and the connection wire of indoor and outdoor units must not collide with any metal beam or edge on the ceiling or touch any metal burrs or sharp metal edge around Connect wires correspondingly by referring to the circuit diagram labeled on the unit or electric box Screws must be tightened up Slipped screws must be replaced by specialized flat head screws Please use the powe...

Page 45: ...Circuit breaker capacity Min sectional area of power cord V Ph Hz A A mm2 Indoor unit 220 240V 50Hz 208 230V 60Hz 3 15 6 1 0 Model Power supply Circuit breaker capacity Min sectional area of power cord V Ph Hz A mm2 GUD35W NhA T 220 240V 50Hz 208 230V 60Hz 16 1 5 GUD50W NhA T 16 1 5 GUD71W NhA T 20 2 5 GUD85W NhA T 25 2 5 GUD100W NhA T 32 4 0 GUD125W NhA T 32 4 0 GUD140W NhA T 40 6 0 GUD100W NhA X...

Page 46: ...breaker are based on a working condition where the working temperature is 40 If working condition changes please adjust the specifications according to national standards Adopt 2pc of 0 75mm power cords to be the communication cords between indoor and outdoor units The maximum length is 100m Please select a proper length according to local conditions Communication cords must not be twisted togethe...

Page 47: ...t fits the terminal screw 4 Form a proper ring and then put it on the terminal board Use a screwdriver to tighten up the terminal screw 2 For strand wires as shown below 1 Use wire cutters to cut off the wire end and then peel away about 10mm of the insulation layer 2 Use a screwdriver to unscrew the terminal screw on the terminal board 3 Use a round terminal fastener or clamp to fix the round ter...

Page 48: ...heck whether the indoor and outdoor units are powered on Match the terminal numbers and wire colors with the colors indicated in the indoor unit Wrong wire connection may burn the electrical components Connect the wires firmly to the wiring box Incomplete installation may lead to fire hazard Please use wire clamps to secure the external covers of connecting wires Insulators must be clamped securel...

Page 49: ...z Power 220V 240V 50Hz 208V 230V 60Hz Outdoor Unit Indoor Unit L N N1 Wired Controller Breaker L N Power 220V 240V 50Hz 208V 230V 60Hz Power 220V 240V 50Hz 208V 230V 60Hz GUD35ZD A T GUD35W NhA T GUD50ZD A T GUD50W NhA T Power cord 3 1 5mm2 Power cord 3 1 0mm2 Communication Cords 2 0 75mm2 Communication Cords 2 0 75mm2 GUD71ZD A T GUD71W NhA T GUD85ZD A T GUD85W NhA T Power cord 3 2 5mm2 Power cor...

Page 50: ...0V 50Hz 208V 230V 60Hz Outdoor Unit Indoor Unit L N L N Wired Controller Breaker L N Power 220V 240V 50Hz 208V 230V 60Hz Power 220V 240V 50Hz 208V 230V 60Hz GUD100ZD A T GUD100W NhA T GUD125ZD A T GUD125W NhA T Power cord 3 4 0mm2 Power cord 3 1 0mm2 Communication Cords 2 0 75mm2 Communication Cords 2 0 75mm2 GUD140ZD A T GUD140W NhA T Power cord 3 6 0mm2 Power cord 3 1 0mm2 Communication Cords 2 ...

Page 51: ...Power 380V 415V 3N 50Hz 60Hz Power 220V 240V 50Hz 208V 230V 60Hz Outdoor Unit Indoor Unit Wired Breaker Controller Power 380V 415V 3N 50Hz 60Hz Power 220V 240V 50Hz 208V 230V 60Hz GUD100ZD A T GUD100W NhA X GUD125ZD A T GUD125W NhA X GUD140ZD A T GUD140W NhA X GUD160ZD A T GUD160W NhA X Power cord 5 1 5mm2 Power cord 3 1 0mm2 Communication Cords 2 0 75mm2 Communication Cords 2 0 75mm2 ...

Page 52: ...door and outdoor units on the terminal board Wrong connection may lead to fire hazard If the connection wires of indoor unit outdoor unit and power cords are not correctly connected the air conditioner may get damaged Ground the indoor and outdoor units through connecting the ground wire The units should comply with applicable local and national rules and regulations on power consumption When conn...

Page 53: ...the big handle front panel of the outdoor unit and insert one end of the communication cord and the power cord to the terminal board Single phase GUD35W NhA T GUD50W NhA T GUD71W NhA T GUD85W NhA T a Wire routing of separated power supply b Wire routing of unified power supply ...

Page 54: ... Unit 49 Single phase GUD100W NhA T GUD125W NhA T GUD140W NhA T a Wire routing of separated power supply for single phase The communication wire gets in from the upper hole The power cords of outdoor unit and indoor unit get in from the lower hole ...

Page 55: ...ch Series Floor Ceiling Type Unit 50 b Wire routing of unified power supply for single phase The communication wire gets in from the upper hole The power cords of outdoor unit and indoor unit get in from the lower hole ...

Page 56: ...se GUD100W NhA X GUD125W NhA X GUD140W NhA X GUD160W NhA X a Wire routing of separated power supply for three phase Only for GUD160W NhA X The communication wire gets in from the upper hole The power cords of outdoor unit and indoor unit get in from the lower hole ...

Page 57: ...m the upper hole The power cords of outdoor unit and indoor unit get in from the lower hole Power cord should be secured along with the right side plate and fixed to the hook with a wire clamp so as to avoid contacting the pipeline The communication line between indoor and outdoor units should also be laid along with the right side plate but away from the power cord ...

Page 58: ...grounded Risk of electric leakage Do the specifications of wires comply with the requirement The unit may fail or its components may get burned Is there any obstacle blocking the air inlet and outlet of the indoor or outdoor units Cooling capacity may become unsatisfactory Have you recorded the length of refrigerant pipe and the refrigerant charging amount The refrigerant charging amount can t be ...

Page 59: ...or unit to see if it is normal 6 Press the swing button or speed control button on remote control or wired control to see if the fan can run normally NOTICE If you use remote control to turn off the unit and then immediately turn the unit on again compressor will need 3min to restart Even if you press ON OFF button on the remote control it won t be started up right away If there s no display on th...

Page 60: ...r is resumed Power plug is loose Re insert the power plug Remote control has low battery Replace the batteries Bad cooling or heating effect Air inlet and outlet of indoor or outdoor units have been blocked Clear the obstacles and keep the room for indoor and outdoor units well ventilated Improper temperature setting Reset a proper temperature Fan speed is too low Reset a proper fan speed Air flow...

Page 61: ... first enables the heating mode or there is refrigerant brushing sound when defrosting under heating It s the sound of 4 way valve switching direction The sound will disappear after the valve changes its direction There is hissing sound when the unit is started or stopped and a slight hissing sound during and after operation It s the sound of gaseous refrigerant that stops flowing and the sound of...

Page 62: ...or fire hazard Please contact Gree s authorized service center and send for professional service staff to repair If the display panel or wired control displays an error code please refer to the error code meaning stated in the following table Number Error code Error 1 E1 Compressor high pressure protection 2 E2 Indoor anti freeze protection 3 E3 Compressor low pressure protection refrigerant lack ...

Page 63: ... 32 P8 Driver module high temperature protection 33 P9 Zero crossing protection 34 PA AC current protection 35 Pc Driver current error 36 Pd Sensor connection protection 37 PE Temperature drift protection 38 PL Bus low voltage protection 39 PH Bus high voltage protection 40 PU Charge loop error 41 PP Input voltage error 42 ee Drive memory chip error 43 C4 ODU jumper cap error 44 dJ Phase loss and ...

Page 64: ... is activated while it will go out when HEAT is deactivated 4 Indicating Lamp of TIMER The indicating lamp will shine when TIMER is activated while it will go out when TIMER is deactivated or the set 5 3 Unit Maintenance Notice Before cleaning please make sure the unit is stopped Cut the circuit breaker and remove the power socket otherwise electric shock may occur Do not wash the air conditioner ...

Page 65: ...Clean the filer screen by a vacuum cleaner or wash it by flashing water If the oil stain on the filter can not be removed or cleaned up wash it by warm water meld with the detergent Dry the filer in the shadow Notice a Never use hot water over 45 C in case of color fading or turning yellow b Never dry it by fire so as to prevent the filter caught fire or deformation Disassemble the left and right ...

Page 66: ...th wire has been attached reliably by the skilled serviceman 3 Check if the exhausted batteries of the wireless controller have been replaced 4 Check if the air filter had been installed well by professional Keep the power switch On 8 hours before the startup of the unit which has not been used for a long period Notice all above should be operated by the skilled serviceman 3 At the End of the Seas...

Page 67: ... Check if the air inlet outlet of indoor outdoor unit is blocked 2 Check if the ground connection is reliable 3 Check if the battery of remote controller is replaced 4 Check if the air filter screen is properly installed 5 If starting up again after long term shut down preset the power switch of air conditioner to ON status before 8h of operation to preheat the crankcase of outdoor compressor 6 Ch...

Page 68: ...re necessary to ensure that the risk of ignition is minimized For repair to the refrigerating system the following precautions shall be complied with prior to conducting work on the system 5 4 1 2 Work Procedure Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while the work is being performed 5 4 1 3 General Work Area All ...

Page 69: ...ation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion All possible ignition sources including cigarette smoking should be kept sufficiently far away from the site of installation repairing removing and disposal during which flamma...

Page 70: ... refrigerating circuit is being used the secondary circuit shall be checked for the presence of refrigerant 4 Marking to the equipment continues to be visible and legible Markings and signs that are illegible shall be corrected 5 Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components un...

Page 71: ...led covers etc If it is absolutely necessary to have an electrical supply to equipment during servicing then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation 5 4 2 2 Particular attention shall be paid to the following to ensure that by working on Electrical components the casing is not altered in such a way that...

Page 72: ... with parts specified by the manufacturer Other parts may result in the ignition of refrigerant in the atmosphere from a leak 5 4 4 Cabling Check that cabling will not be subject to wear corrosion excessive pressure vibration sharp edges or any other adverse environmental effects The check shall also take into account the effects of ageing or continual vibration from sources such as compressors or...

Page 73: ...achieved then venting to atmosphere and finally pulling down to a vacuum This process shall be repeated until no refrigerant is within the system When the final OFN charge is used the system shall be vented down to atmospheric pressure to enable work to take place This operation is absolutely vital if brazing operations on the pipework are to take place Ensure that the outlet for the vacuum pump i...

Page 74: ...th the equipment and all its detail It is recommended good practice that all refrigerants are recovered safely Prior to the task being carried out an oil and refrigerant sample shall be taken in case analysis is required prior to re use of reclaimed refrigerant It is essential that electrical power is available before the task is commenced 1 Become familiar with the equipment and its operation 2 I...

Page 75: ...ion valves on the equipment are closed off 11 Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked 5 4 9 Labelling Equipment shall be labelled stating that it has been de commissioned and emptied of refrigerant The label shall be dated and signed Ensure that there are labels on the equipment stating the equipment contains flammable ref...

Page 76: ...en properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release Consult manufacturer if in doubt The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder and the relevant Waste Transfer Notice arranged Do not mix refrigerants in recovery units and especially not in cylinders If...

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