39
Remedy
Malfunction
Cause
Shower pattern
collapses when
another
hot
tap is
turned on.
(a) Property water
supply pipe
partially blocked or
undersized.
Reduce the
simultaneous demand.
Shower pattern
collapses when
another
cold
tap is
turned on.
Shower control
operating sequence
is “off, hot, cool”.
Shower insufficiently
hot without pressing
red button and
rotating further.
Shower control
"drums"
whilst in
use
.
Shower control
"thumps" when
another tap is
suddenly turned off.
(a) The heater is not
capable of supplying
several outlets at
the same time.
(b) Property stop or
servicing valve not
fully open.
(c) Insufficient mains
cold water pressure.
Hot and cold water
supplies have been
connected in reverse.
Adjustable maximum
temperature incorrectly
set.
(a) Inlet strainer
blocked creating
an excessive
imbalance in inlet
pressures.
Inlet check valve faulty.
Contact the local water
supplier or increase
supply pipe size to
premises.
Contact the local water
supplier or increase
supply pipe size to
premises.
Refer to the section
Installation:“Reversed
Inlet Supplies”
.
Refer to the section
Commissioning:
“Adjustable Maximum
Temperature Setting”
.
Check and clean inlet
strainers.
(a) Remove cartridge
and if possible
clear check valve
obstruction.
(b) Renew cartridge.
Open valve.
A B C
(d) Inlet strainer
blocked.
Check and clean inlet
strainers.
(b) Inlet strainer
blocked.
Check and clean inlet
strainers
Fit pressure reducing
valve. Refer to
Installation
Requirements
.
(b) Supply pressure in
excess of 5 bar
maintained.
Summary of Contents for Combiforce 415
Page 51: ...51 Appendix Notes ...