COFFEtek NEVA 4, Technical Manual

Page: 35 / 40

COFFE tek LTD
35 22/02/08 Issue 1 NEVA 4
FAULT POSSIBLE CAUSE ACTION
Heater tank
boiling over
Heater tank
overfilling
Bearding of ingredient
Machine floods
No display
TEMP LOW
displayed
(a) Incorrect
desired
temperature setting
(b)
Temperature probe fault
(c)
MPU Board fault
(d)
Short on solid state relay
(a)
Probe open circuit
(b)
Inlet valve fault
(c) Level probe incorrectly
positioned
(a)
Extractor fan fault
(b) Steam hoods missing
from mixing bowls or
incorrectly positioned
(a) Dispense
pipes incorrectly
fitted to dispense head
(b) Mixing
bowls incorrectly
fitted
(c)
Whipper seals missing
(d) Overflow pipe incorrectly
fitted
(a)
Display connector loose
(a)
Thermal cut-out tripped
(b)
Heater fuse blown
(c) Incorrect temperature
setting
(a) Reset
desired
temperature setting
(b) Replace
probe
(c)
Replace MPU board
(d) Replace
relay
(a)
Check probe circuit
(b)
Check inlet valve
and replace if necessary
(c) Reposition
probe
(a) Check
fan
(b)
Fit steam hoods to mixing
bowls and position
correctly.
(a) Reposition
pipes
(b)
Reposition mixing bowls
(c) Check
seals
(d)
Refit overflow pipe
(a) Refit
connector
(a) Reset
cut-out
(b) Check
fuse
(c)
Check program setting