38
Installation instructions & user guide
T210047 v1.00 March 2022 - InstaTap Commercial
SECTION 10 Service warnings and troubleshooting
• The UCB is fitted with an intelligent fault diagnosing system and is able
to detect various fault conditions. Some of these are less serious and it
will continue to operate as normal, while others are more serious and will
cause the UCB to be disabled.
10.1 Troubleshooting
Non functional warnings
Possible causes
Action
Water turned off.
Inlet hose kinked or bent.
Low in-coming water pressure.
Check water supply and
isolation valve
Check in-coming water is at
minimum of 2-bar.
Low-water level probe scaled
up.
De-scale inside of tank and level
sensors.
Normal operating probe scaled
up.
De-scale level sensors.
Over-boiled (due to excessive
lime-scale in tank).
Faulty Element.
Thermistor disconnected, wires
cut or faulty.
Boil-dry safety switch tripped
or faulty.
De-scale tank and level sensors.
Isolate machine and wait
10mins, then turn back on again.
Reduce temperature setting.
Call service if fault persists.
Thermistor disconnected, wires
cut or faulty.
Call service
READY
o
C
96
CAUTION
HOT WATER
!
!
CLEAN
PROBES
NOT
READY
o
C
HEATING
NOT
READY
o
C
HEATING
70
o
C
SOFT
MEDIUM HARD
CHANGE FILTER
Pr
READY
o
C
96
CAUTION
HOT WATER
NOT
READY
o
C
96
CHECK
WATER
!
!
CHANGE FILTER
NOT
READY
OF
!
!
READY
CHECK
WATER
!
!
READY
!
!
CLEAN
PROBES
READY
MEDIUM
!
!
NOT
READY
o
C
!
CHECK
WATER
READY
o
C
96
CAUTION
HOT WATER
NOT
READY
o
C
HEATING
NOT
READY
o
C
HEATING
70
o
C
SOFT
MEDIUM HARD
CHANGE FILTER
Pr
READY
o
C
96
CAUTION
HOT WATER
NOT
READY
o
C
96
CHECK
WATER
!
!
CHANGE FILTER
NOT
READY
OF
!
!
READY
CHECK
WATER
!
!
READY
!
!
CLEAN
PROBES
READY
MEDIUM
!
!
NOT
READY
o
C
!
CHECK
WATER
READY
o
C
96
CAUTION
HOT WATER
Flashing
Flashing
NOT
READY
TH
!
!
• Before calling for service, switch the UCB off at the mains supply and then
switch back on after 10 minutes. If the fault does not clear, call technical
support for advice on 0345 6 005 05.
NOT
READY
TH
!
!
