gledhill Torrent Stainless OV, Instruction Manual

Page 32

Page 33

SERVICING AND MAINTENANCE

SERVICING AND MAINTENANCE

FAULT FINDING

FAULT FINDING

UNSATISFACTORY

HOT WATER 

PERFORMANCE

Is the power supply

to the PHE controller

switched on

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

Switch it on

Follow the

fault finding

chart

Is the boiler

thermostat 

set to max?

Is the model

suitable for the

hot water

requirement?

Change for

correct

model

Change boiler 

for larger 

model

Adjust boiler 

thermostat to 

maximum

Is the Torrent

thermostat set

too low?

Is the boiler 

output at least

10% more than the

rad. loading?

Does the boiler

flow reach

temperature?

Is the boiler

thermostat

adjustable?

Correct Torrent

thermostat setting

(set to 75ºC)

Report to the

boiler 

manufacturer

Adjust to

maximum

Descaling

of the PHE

required

Is heat

exchanger

scaled up

internally?

(Indicated by 

reduction of 

flow rate)

Alter pipe

sizes

Does the temp

rise across the

boiler exceed 11°C

Increase boiler

pump setting

H.W. flow too

great?

Is the temp. 

rise too high?

Regulate flow

from outlet fitting

(tap)

Is the circuit 

correctly sized?

Fit an air vent

Is the temp.

rise now

satisfactory?

Investigate for

blockage

Is air

trapped in

the primary

circuit?

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 

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

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

1 

2 

3 

4 

1 

2 

3 

4 

1 

2 

3 

4 

5 

6 

7 

8 

1 

2 

1 
2 
3 
4 
5 

6 
7 
8 
9 

1 

10 

2  3 

4  5  6 

J18 

J20 

J19 

J3 

J7 

J8 

J1