Midea MSMTAU-09HRFN8-QRD6GW, Руководство по обслуживанию

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materials which are inherently resistant to being
corroded or are suitably protected against being
so corroded.
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.
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.


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.
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
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 source of ignition and is