Operating manual
Page 12
4
CURRENT
REPAIR
OF
THE
PRODUCT
4.1
G
ENERAL DESCRIPTION
To provide diagnostics of the problems, see Table 8.
If a problem cannot be diagnosed or trouble shooting cannot be provided, con-
tact the Manufacturer’s service center.
4.2
S
AFETY FEATURES
Only qualified personnel, examined in occupational safety may perform repair
works.
The Product must be grounded before repair works. Check the grounding of the
Product.
It is PROHIBITED to put a poster «DO NOT switch on! Under Operation!»,
when power supply switch is in OFF position.
Replacing defected parts, cards and modules when power of device under repair is ON
is STRICTLY PROHIBITED
Installation, commissioning and repair works are PROHIBITED in the room, where
less than 2 people present
4.3
C
URRENT REPAIR
The service personnel can provide repair works as given in Table 8.
Table 8 – Possible problems / defects and troubleshooting
Problem / defect Possible reasons
To do
Piano type LED does
not operate (no glow-
ing)
No power supply
Check power cable connection
Provide power supply (circuit breaker of main
power switchboard might be switched off)
Circuit breaker switched
off
Take off casing panel and switch on the cir-
cuit breaker inside the casing