Keeler Cryomatic 2509-P-1000-JPN, Service Manual

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KCU401-2 Keeler Cryomatic Service Manual
7. Faultfinding Chart
Problem/Fault Possible Cause Corrective Action Section
1 system does not
power up a mains fuse in plug blown replace with correct rating
and type
b inlet fuse(s) replace with correct rating
and type 3
c mains inlet module faulty check for mains voltage on
output terminals – replace if
necessary 3
d power supply faulty Check for correct voltages
on output connector –
replace if necessary 3
2 system appears to
power up but LCD
screen is blank a contrast setting incorrect adjust contrast level to
correct setting 5
b LCD module faulty check that LCD flat ribbon is
connected properly –
replace if necessary 5
3 system appears to
power up but
nothing happens a firmware corrupted re-install firmware 6
b faulty controller PCB replace controller PCB 5
4
no gas supply
indicated on LCD
screen a gas cylinder not connected
or valve not open connect cylinder and open
valves
b insufficient cylinder pressure replace cylinder
c inlet filter clogged replace inlet filter 4
d faulty pressure sensor replace pneumatic module 4
5 system will not
recognise probe a faulty memory IC in probe
coupling replace/re-program
b possible damage to
electrical contacts of
console or probe - dirty or
oxidised probe contacts inspect contacts and clean
carefully if necessary
6
probe does not
freeze properly
(low or zero flow) a residual moisture in probe
following sterilisation re-purge probe
b probe blocked with
particulate matter replace/repair probe
c gas supply insufficient check cylinder, connection
and valve – replace cylinder
if necessary
d faulty/blocked control valve replace pneumatic module 4
e exhaust hose is blocked or
occluded. check the exhaust hose for
blockages or occlusions -
replace if necessary
f faulty pressure sensor replace pneumatic module 4
g faulty controller PCB replace controller PCB 5
7 probe defrosts
slowly a probe fault – possible
internal leak replace probe
b faulty/leaking control valve replace valve or pneumatic
module 4
c leak internal to console check for internal gas leaks
– repair leak(s) or replace
pneumatic module 4
8 excessive flow rate
from exhaust a faulty/leaking control valve replace valve or pneumatic
module 4
9
gas leaks from
coupling when
probe is
disconnected a faulty ‘o’ rings in QR
connectors replace pneumatic module 4
10
mute control does
not function a faulty membrane label replace enclosure front 2