Royal Sovereign ARP-2214P Manual page 15

ARP-2214P
1.9 Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and component inspection
procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the
circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to
continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the
equipment so 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 there no live electrical components and wiring are exposed while charging,
recovering or purging the system; that there is continuity of earth bonding.
Every working procedure for maintenance, service and repair operations that affects safety means shall only
be carried out by competent persons according to Annex HH (competence of service personnel by training,
this training is carried out by national training organisations that are accredited to teach the relevant national
competency standards that may be set in legislation. The achieved competence should be documented by a
certificate).
All the work men who are engaging in the refrigeration system should bear the valid certification awarded by
the authoritative organization and the qualification for dealing with the refrigeration system recognized by this
industry. If it needs other technician to maintain and repair the appliance, they should be supervised by the
person who bears the qualification for using the flammable refrigerant.
2. REPAIRS TO SEALED COMPONENTS
2.1 During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon prior to any removal of sealed 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.
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 the level of protection is affected. This shall include damage to cables,
excessive number of connections, terminals not made to original specification, damage to seals, incorrect
fitting of glands, etc. Ensure that apparatus is mounted securely. Ensure that seals or sealing materials have
not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer's specifications.
NOTE : The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.
3. REPAIR TO INTRINSICALLY SAFE COMPONENTS
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not ex-
ceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are
the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus
shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts
may result in the ignition of refrigerant in the atmosphere from a leak.
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 aging or continual vibration
from sources such as compressors or fans.
5. DETECTION OF FLAMMABLE REFRIGERANTS
Under no circumstances shall potential sources of ignition be used in the searching for or detection of refriger-
ant leaks. A halide torch (or any other detector using a naked flame) shall not be used.
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