Troubleshooting - Mistral MA02016KRY30 Instruction Manual

Trouble Shooting
1.Information on servicing
1. Checks to the area
Prior to beginning work on systems containing
flammable refrigerants, safety checks are
necessary to ensure that the risk of ignition is
minimized. For repair to the refrigerating system,
the following precautions shall be complied with
prior to conducting work on the system.
2. Work procedure
Work shall be undertaken under a controlled
procedure so as to minimize the risk of a
flammable gas or vapour being present while the
work is being performed.
3. General work area
All maintenance staff and others working in the
local area shall be instructed on the nature of
work being carried out. Work in confined spaces
shall be avoided.
4. Checking for presence of refrigerant
The area shall be checked with an appropriate
refrigerant detector prior to and during work,
to ensure the technician is aware of potentially
flammable atmospheres. Ensure that the leak
detection equipment being used is suitable for
use with flammable refrigerants, i.e. non-sparking,
adequately sealed or intrinsically safe.
5. Presence of fire extinguisher
If any hot work is to be conducted on the
refrigerating equipment or any associated parts,
appropriate fire extinguishing equipment shall be
available to hand. Have a dry powder or CO2
fire extinguisher adjacent to the charging area.
6. No ignition sources
No person carrying out work in relation to a
refrigerating system which involves exposing
any pipe work that contains or has contained
flammable refrigerant shall use any sources of
ignition in such a manner that it may lead to
the risk of fire or explosion. All possible ignition
sources, including cigarette smoking, should
be kept sufficiently far away from the site of
installation, repairing, removing and disposal,
during which flammable refrigerant can possibly
be released to the surrounding space. Prior
to work taking place, the area around the
equipment is to be surveyed to make sure that
there are no flammable hazards or ignition risks.
"No Smoking" signs shall be displayed.
7. Ventilated area
Ensure that the area is in the open or that it is
adequately ventilated before breaking into the
system or conducting any hot work. A degree
of ventilation shall continue during the period
that the work is carried out. The ventilation
should safely disperse any released refrigerant
and preferably expel it externally into the
atmosphere.
8. Checks to the refrigerating 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
the manufacturer's technical department for
assistance.
The following checks shall be applied to
installations using flammable refrigerants:
– The actual refrigerant charge 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 of refrigerant;
– Marking to the equipment continues to be
visible and legible. Markings and signs that
are illegible shall be corrected;
– Refrigerating pipe or components are
installed in a position where they are unlikely
to be exposed to any substance which may
corrode refrigerant containing components,
unless the components are constructed of
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.
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