Haier 1U71S2SG1FA Service Manual

Also see for 1U71S2SG1FA: Installation manual Service manual Installation manual

Contents

30Ventilated Area- Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conductingany hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilationshould safely disperse any released refrigerant and preferably expel it externally into the atmosphere.Checks to the Refrigeration Equipment- Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult themanufacturer’s technical department for assistance.The following checks shall be applied to installations- The charge size is in accordance with the room size within which the refrigerant containing parts are installed;- The ventilation machinery and outlets are operating adequately and are not obstructed;- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence ofrefrigerant;- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall becorrected;- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to anysubstance which may corrode refrigerant containing components, unless the components are constructed ofmaterials which are inherently resistant to being corroded or are suitably protected against being so corroded.Checks to Electrical Devices- Repair and maintenance to electrical components shall include initial safety checks and component inspectionprocedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to thecircuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continueoperation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipmentso all parties are advised.- Initial safety checks shall include:• That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;• That no live electrical components and wiring are exposed while charging, recovering or purging the system;• That there is continuity of earth bonding.Repairs to Sealed Components- During repairs to sealed components, all electrical supplies shall be disconnected prior to any removal ofsealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, thena permanently operating form of leak detection shall be located at the most critical point to warn of a potentiallyhazardous situation.- Ensure that by working on electrical components, the casing is not altered in such a way that the level ofprotection is affected, including damage to cables, excessive number of connections, terminals not made tooriginal specification, damage to seals, incorrect fitting of glands, etc.- Ensure that the apparatus is mounted securely.- Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purposeof preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with themanufacturer’s specifications.