DC Inverter U-match Series Cassette Type Unit
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refrigerants:
(1) The charge size is in accordance with the room size within which the
refrigerant containing parts are installed.
(2) The ventilation machinery and outlets are operating adequately and are
not obstructed.
(3) If an indirect refrigerating circuit is being used, the secondary circuit shall
be checked for the presence of refrigerant.
(4) Marking to the equipment continues to be visible and legible. Markings
and signs that are illegible shall be corrected.
(5) Refrigeration 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.
5.4.1.9 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:
(1) Those capacitors are discharged: this shall be done in a safe manner to
avoid possibility of sparking.
(2) That no live electrical components and wiring are exposed while charging,
recovering or purging the system.
(3) That there is continuity of earth bonding.
5.4.2 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 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.
