2 For your safety
Merrychef conneX
®
service and repair manual
15
Safety hazard: electrical power
Danger
Where or in what situations does the hazard arise?
Preventative action
A risk of electric
shock
Live parts:
Under covers
Under the control panel
On the appliance and on adjacent metal parts
On the appliance and on adjacent metallic accessories
Work on the electrical system must only
be performed by qualified electricians
from an authorized customer service
company
Before removing the covers:
Switch off all connections to the power
supply
Take protective measures at every
power switch to ensure that the power
cannot be switched on again.
Wait 15 minutes to allow the DC bus
capacitors to discharge
Make sure that the appliance is de-
energized
Make sure that the electrical
connections are intact and fixed
securely before plugging the appliance
back into the power supply.
Before putting the appliance back into
use, make sure that the appliance,
including all metallic accessories, is
connected to an equipotential bonding
system.
Dead working should be the normal method of carrying out work on electrical equipment or circuits. Live working should only
be carried out in particular circumstances where it is unreasonable to work dead.
No person shall be engaged in any work activity on or so near any live conductor (other than one suitably covered with
insulating material so as to prevent danger) that danger may arise unless;
a)
It is unreasonable in all the circumstances for it to be dead; and
b)
It is reasonable in all the circumstances for the service technician to be at work on or near it while it is live; and
c)
Suitable precautions (including where necessary the provision of suitable protective equipment) are taken to prevent
injury.
When working on the oven it is important that the earthing of the power supply to the equipment is adequate and efficient.
In customers' premises this is likely to be unknown, so it is important to carry out a test to demonstrate the efficacy of the
earthing. The safe way to do this is to measure the earth loop impedance of the power supply using an instrument designed
for that purpose. If the test indicates an inadequate earth, the customer must be informed that the work cannot continue until
it has been rectified.
Simple 'Go/No go' plug-in testers will in general only provide a polarity check and an indication that an earth may be present,
but not its effectiveness.
Safety hazard: mechanical parts of the appliance
Danger
Where or in what situations does the hazard arise?
Preventative action
Risk of cuts from
sharp edges
During servicing work
When handling sheet-metal parts
Exercise caution when performing this
action
Wear personal protective equipment
Risk of body parts
being crushed if
the appliance tips
over or falls off
When the appliance is being moved e.g., to gain better
access to the connections
Always observe the requirements for
the supporting surface
