Blaupunkt Moby Blue S 0709E - Repair and Maintenance Procedures

MBS0709E, MBS12E
www.blaupunkt.com
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Initial safety checks shall include:
• That capacitors are discharged: this shall be done in a safe manner to avoid possi-
bility 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.
2. Repairs to sealed components
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
isabsolutely 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) Particular attention shall be paid to the following to ensure that by working on elec-
trical components, the casing is not altered in such a way that the level of protection is
aected. This shall include damage to cables, excessive number of connections, termi-
nals not made to original specication, damage to seals, incorrect tting 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
ammable atmospheres. Replacement parts shall be in accordance with the manufac-
turer’s specications.
NOTE:
The use of silicon sealant may inhibit the eectiveness 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 en-
suring 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 ammable atmosphere. The test apparatus shall be at
the correct rating. Replace components only with parts specied 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 eects. The check shall also take into
account the eects of aging or continual vibration from sources such as compressors
or fans.