INVENTOR P8MVI32-09WiFi, Руководство по обслуживанию, Страница: 8 / 72

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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:
l
that capacitors are discharged: this shall
be done in a safe manner to avoid
possibility of sparking;
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that there no live electrical components
and wiring are exposed while charging,
recovering or purging the system;
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that there is continuity of earth bonding.
10. Repairs to sealed components
10.1 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.
10.2 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.
l
Ensure that apparatus is mounted
securely.
l
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.
11. Repair to intrinsically safe
components
Do not apply any permanent inductive or
capacitance loads to the circuit without
ensuring that this will not exceed 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.
12. 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.
13. Detection of flammable refrigerants
Under no circumstances shall potential
sources of ignition be used in the
searching for or detection of refrigerant
leaks. A halide torch (or any other detector
using a naked flame)
shall not be used.
14. Leak detection methods