Table of Contents
Advertisement
SERVICING AND MAINTENANCE
UNSATISFACTORY
Is the power supply
HOT WATER
to the PHE controller
PERFORMANCE
switched on
YES
Is the model
Is the boiler
YES
suitable for the
thermostat
hot water
set to max?
requirement?
YES
NO
Is the Torrent
Adjust boiler
thermostat set
thermostat to
too low?
maximum
YES
Correct Torrent
thermostat setting
(set to 75ºC)
Is the boiler
Report to the
NO
thermostat
boiler
adjustable?
manufacturer
YES
Adjust to
maximum
Descaling
of the PHE
required
YES
Is heat
NO
exchanger
scaled up
internally?
(Indicated by
reduction of
ow rate)
Alter pipe
sizes
FAULT FINDING
Follow the
NO
Switch it on
fault nding
chart
Change for
NO
correct
model
Is the boiler
Change boiler
NO
NO
output at least
for larger
10% more than the
model
rad. loading?
YES
Does the boiler
ow reach
temperature?
NO
YES
Does the temp
rise across the
boiler exceed 11°C
YES
Increase boiler
NO
pump setting
NO
Is the temp.
H.W. ow too
rise too high?
great?
YES
YES
Regulate ow
from outlet tting
Is air
(tap)
trapped in
the primary
circuit?
NO
Is the circuit
NO
YES
correctly sized?
Fit an air vent
YES
Investigate for
Is the temp.
blockage
NO
rise now
satisfactory?
YES
Page 32
SERVICING AND MAINTENANCE
Test Equipment
The initial assumption in this procedure is that the plumbing and water supply is
working effectively. If in doubt please confirm and refer to the end of this section for
advice on specific components.
A multi meter, a weir gauge and a thermometer will be required to confirm that all
the components are working effectively.
The PWM controller PCB manufacturer suggests "Fluke 87 TRUE RMS Multi meter" as
a suitable product. This will be able to measure;
- the frequency output from the Board to the pump
- the Duty cycle % output from the Board to the pump
Connection numbering
For reference the connections to the PCB are numbered below for
1
4 5 6
2
4
J19
1
3
2
4
J20
1
3
7
14
6
13
5
12
4
11
J18
10
3
2
9
8
1
J7
J3
2
8
7
6
5
4
2
1
3
1
Logical sequence;
- check electrical connections fault finding section on page 34 first to ensure your
own safety. This section will potentially identify any short circuited components
and/or wiring faults that need to be rectified before continuing to work on the
appliance.
- check that the correct information is being supplied to the board. This section will
identify if any sensors are faulty or out of tolerance. These will need to be replaced
before continuing
- check that the overheat link is present (J7 see page 37)
- check that the outputs to the board are being generated. If at this stage the board
does not provide the correct outputs then potentially the board should be replaced
- check the pump electrical circuit
2 3
J1
J8
6
1
7
2
8
3
9
4
10
5
FAULT FINDING
Page 33
Hide quick links:
Advertisement
Table of Contents
