POTTERTON CONTROLS CUSTOMER GUIDE FOR THE EP2000/EP2002/EP3002 1) THE PROGRAMMER AND YOUR SYSTEM If youhave an EP2000 Programmer, then you can set the HOT WATER and CENTRAL HEATING to come ON together for two time periods a day. If you have an EP2002 Programmer, then you can set the HOT WATER and CENTRAL HEATING to come ON together for two time periods a day, from MONDAY to FRIDAY, with different ON/OFF times for SATURDAY and SUNDAY, if required. If you have an EP3002 Programmer, then you can set the HOT WATER and CENTRAL HEATING to come ON together for two time periods a day, with different ON/OFF times for each day, if required. 2) SETTING THE PROGRAMMER FOR BUILT- IN ON/OFF TIMES The programmer already has built-in ON/OFF time periods, which are: MODEL EP2000 EP2002 EP3002 ON1 6.30am 6.30am 6.30am OFF1 9.30am 9.30am 9.30am ON2 4.30pm 4.30pm 4.30pm OFF2 10.30pm 10.30pm 10.30pm (MON - FRI) (SAT - SUN) (MON - SUN) These times can be used, by setting the correct time and day, as described for the 3 models in section 1.2, 2.2 or 3.2 overleaf. To set up your own ON/OFF times for your model, refer to section 1.3, 2.3 or 3.3 overleaf. If you wish to return to the built in time periods, after changes have been made to them, simply: Ensure the slider is in RUN position. Press and hold down the STEP & + button, then after 5 seconds, release the 2 buttons. The built-in times are now reinstated. 3) HOW TO SET YOUR PROGRAMMER Model: EP2000 1.1 OPEN DOOR from top edge 1.2 TO SET THE CLOCK Move slider to CLOCK. Adjust displayed time, using - & + buttons 1.3 SETTING THE ON/OFF TIMES Move slider to SET. Adjust ON1 time, using - & + buttons 1.4 Press STEP button. Adjust OFF1 time, using - & + buttons. Repeat for ON2 & OFF2 1.5 When complete, move slider to RUN CLOSE DOOR Model: EP2002 2.1 OPEN DOOR from top edge & + buttons. by pressing DAY button 3.3 SETTING THE ON/OFF TIMES (MON to FRI) Move slider to SET. Adjust displayed time. Adjust displayed time using .7 4) Example of ON/OFF times copied to next day When complete. Repeat above steps to set up SAT & SUN ON1.6 When complete. using .4 Press STEP button Adjust OFF1 time. to copy ON/OFF times. using .& + buttons.3 SETTING THE ON/OFF TIMES (MON . 3.& + buttons. move slider to RUN and CLOSE DOOR USING THE HW AND CH SLIDERS During Normal Operation.5 COPYING ON/OFF TIMES.& + buttons. Repeat above steps to set up the remaining days. Adjust ON1 time. 3.2.5 SETTING THE ON/OFF TIMES (SAT & SUN) Press DAY button. OFF2 2. Repeat for ON2 & OFF2 2. TO NEXT DAY Press DAY button.2 TO SET THE CLOCK & DAY Move slider to CLOCK. by moving these sliders you can select how you wish your system to work: OFF TIMED Ignores the ON/OFF time periods set in memory Allows the CH or HW to run to the ON/OFF times you have set in the programmer's memory .& + buttons. using . Repeat as required. by pressing DAY button 2. using . OFF1. Adjust day. 3. to select day you want to copy Press COPY. Adjust ON1 time. Adjust OFF1 time.& + buttons 2.6 3. to next day. to go to next day.4 Press STEP button. ON2. Repeat for ON2 & OFF2 Press DAY button.1 3. move slider to RUN CLOSE DOOR Model: EP3002 3. Adjust day.SUN) Move slider to SET. using .2 OPEN DOOR from top edge TO SET THE CLOCK & DAY Move slider to CLOCK. 2 or 3 hours. If yours is a simple system. the display will go blank and the programmer will maintain the set times and the clock for 12 hours. when the sliders are in TIMED or ONCE position. will not operate. boiler and cylinder thermostats) may affect the switching of your boiler. pumps etc. the change is only temporary. and the CH button advances CH. when CENTRAL HEATING is on. you may have to reset the clock and ON/OFF times. So although the indicator shows that the central heating is ON. e. Other controls in your system (such as room. Internal damage can occur if not correctly protected (5 Amp % 13 Amp fuses are NOT suitable) 10) DIAGNOSING POSSIBLE OPERATIONAL PROBLEMS No clock display 1. The button on the HW channel advances HW. This means the HOT WATER is automatically turned ON. To advance the programme. 9) GUIDE TO OPERATIONAL PROBLEMS WARNING: DISCONNECT THE MAINS SUPPLY BEFORE THE PROGRAMMER IS REMOVED Ensure ALL supplies to the programmer are fused at 3 Amps. After that time. so set the programmer switch ON. during an OFF period for 1. The status of either channel is shown by the indicators to the right of the sliders. simply press the relevant ADV button and the CH or HW will go OFF (IF ON) or ON (IF OFF). pressing the EXT or ADV buttons on CH will also extend or advance the HW. any electrical items. the boiler itself could be OFF. If you press the button a fourth time. NOTE: Using either the EXT or ADV buttons will not affect the ON/OFF times set in the programmer's memory. 7) OPERATION NOTES It does take time for the boiler to produce the required heating and hot water temperatures. NOTE: During the time that the electricity is off. The HW & CH sliders have a mechanical interlock to protect simple heating systems which can only heat the radiators when the HOT WATER is on. Boiler. 5) USING THE ADVANCE BUTTONS The ADV buttons allow you to go forward to the next ON or OFF time. the programmer will return to the original set times. press again to return to original status. When the interlock is set for simple heating systems. Check mains supply switch to programmer is ON 2.g. for example. 6) USING THE EXTEND BUTTONS The EXT buttons allow you to extend a current ON period or switch your HW or CH on. Check mains supply fuses to programmer are OK . the interlock will automatically cut the programming facilities that your system cannot cope with.ONCE ON Allows your CH or HW to run once a day from the first ON time to the last OFF time Will turn the CH or HW on continuously 24 hours a day The channel indicators to the right of the HW/CH sliders will illuminate when the relevant channel is ON and extinguish when the channel is OFF. (Ask your installer to explain how they work) 8) PROGRAMMER MEMORY BACKUP If the electricity fails or is switched off. half an hour earlier than required. If symptoms persist contact me . Check programmer output is ON (i. or the slider under the door is not set to RUN Heating and Hot Water will not work 1. (For simple systems) See Installers Guide Instruction. Check that the external Thermostats are turned up Heating not working.buttons at the same time (time of day and ON/OFF times may need to be set). Incorrect time displayed See 'How to Set Your Programmer' section If normal operation cannot be achieved by the above remedies RESET Programmer by pressing + & . Check remedy points under 'No clock display' 2.e indicator is lit) 3. but HOT WATER is working Check the 10/16 interlock setting.Buttons will not function EXT and ADV buttons will not work if the HW or CH slider are in OFF or ON mode.
- Potterton Timer Control Manual Online
- Potterton Timer Control Manual Pdf
7 different tables below are an excellent manual for owners of boiler of Potterton brand. Each of them describes the possible problems of a particular model of boiler of this brand. Problems of some models can be identified with the help of an error code and can be fixed with the help of information from the tables. In other models, the problem can be identified by visual inspection of the boiler. Before call the service, conduct an independent examination and draw a parallel between identified problem ant the same one in the manual. Perhaps one of these tables will save your time and money.
Potterton Diplomat HE Boiler Troubleshooting

Problem | Cause |
---|
Pilot will not light | 1. Air in gas line. |
2. Faulty gas control valve. |
3. No spark at electrode tip. |
4. Blocked pilot injector. |
Pilot does not remain alight when knob released. | 1. Over heat cut off device tripped. |
2. Loose connection on leads to overheat cut off device. |
3. Loose thermocouple connection. |
4. Faulty thermocouple. |
5. Faulty over heat cut off device. |
6. Faulty gas control valve. |
7. Pilot partially blocked or needs adjusting. |
» | 1. No electrical supply to burner. |
Pilot established - main burner does not light. | 2. On/off switch is in 'OFF' position. |
3. Boiler thermostat set too low. |
4. Faulty thermostat or connections. |
5. Faulty gas control valve. |
Main burner remains alight when thermostat satisfied. | 1. Faulty thermostat. |
2. Faulty gas control valve. |
Main burner remains alight when on/off switch in 'OFF' position. | 1. Faulty on/off switch. |
2. Faulty main gas valve. |
3. Incorrect control circuit. |
Potterton Timer Control Manual Online

Potterton Eurocondense Plus Boiler Troubleshooting
Potterton User Manuals Listed below are all the Potterton USER manuals. Just click on the model or the Gas council number and the manual will download at the bottom of the page, when the download has finished double click the download and the manual will open right click to save. What Are Working/Setting Instructions For A Potterton Wall Timer? - Answered by a verified Plumber. What Are Working/Setting Instructions For A Potterton. But can't reignite although have read the online manual on how to. A Potterton EP2001 control/timer. A: Yes, it will clip onto your existing backplate for an easy swap. Heating controls and accessories. We have a range of heating controls and boiler accessories to help you install hassle-free, energy efficient and cost effective heating systems for your customers while meeting all the legislative requirements.
Display flashing (Code-No.) | Description | Explanations (Possible causes and function sequence) |
---|
10 | Outdoor temperature sensor short circuit or discontinuity | Check connection and outdoor temperature sensor |
20 | Boiler flow sensor short circuit or open circuit | Check connection |
40 | Boiler return sensor short circuit or open circuit |
50 | Hot-water sensor 1 short circuit or open circuit |
52 | Hot-water sensor 2 short circuit or open circuit |
61 | Fault, room control module RRG | Check room control module RRG |
62 | Wrong room control module connected | Connect compatible room control module |
81 | Short circuit on LPB bus or no bus feed | Check bus |
82 | Address conflict on LPB bus (EUROCONTROL) | Check addresses of connected control modules |
91 | EEPROM data loss | Internal BMU error, process sensor, change BMU |
92 | Hardware error |
100 | Two time master | Check EUROCONTROL timer master |
110 | Limit stat tripped | Allow unit to cool down and reset. If fault occurs several times, notify heating engineer temperature stat open circuit |
111 | Max. temperature tripped | Not heat requirement, pump defective, radiator valves closed |
119 | Water pressure switch tripped | Check water pressure and add water if required |
132 | Safety switch off | e.g. contact F7 or F5 open |
133 | No flame detected (no flame message after expiration of safety time) | Reset, if fault occurs a number of time, notify heating engineer, insufficient gas , check polarity of line power connection, ignition electrodes and ionization current |
134 | Flame failure during operation | Automatic restart attempt by PARAMOUNT |
135 | Incorrect air supply | Fan speed above or below speed threshold |
140 | Impermissible LPB segment number or equipment number | Check setting on EUROCONTROL |
148 | Incompatibility between LPB interface/basic unit |
151 | Internal error in BMU | Check parameters |
152 | Error in BMU parameter settings | Repeat parameter settings |
153 | EUROCONDENSE EC PLUS disabled | Press reset button |
154 | Temperature fault | Parameter incorrectly set |
160 | Fan speed error | Fan speed not reached |
161 | Max. speed exceeded | Max. fan speed exceeded |

Potterton Timer Control Manual Pdf
Potterton Potterton 15 Boiler Troubleshooting
Problem | Possible causes | Solution |
---|
The radiators are cold. | The temperature set point for the heating is too low. | Increase the value with the CH temperature knob or if a room thermostat is connected, increase the temperature on the room thermostat. |
The heating mode is deactivated. | Activate the heating mode. |
The radiator valves are not open. | Open the valves of all radiators connected to the system. |
The boiler is not working. | Check that the boiler is being supplied with power. Check fuses and switches. |
Check whether the gas isolation cock is properly open. |
If the property has a prepayment meter ensure it has sufficient credit. |
The water pressure is too low (< 0.5 bar). | Re-pressurise the system. |
The boiler is not working. | The temperature set point for the heating is too low. | Increase the value with the CH temperature knob or if a room thermostat is connected, increase the temperature on the room thermostat. |
No demand for heating. | Ensure that timers & thermostats are calling for heat. |
No power supply. | Check that the boiler is being supplied with power. Check the fuses and switches. |
The water pressure is too low (< 0.5 bar). | Re-pressurise the system. |
The boiler is indicating an error. | Press the Reset button. Correct the error, if possible. |
The gas pressure is too low. | Check whether the gas isolation cock is fully open. Open the gas isolation cock. |
Condensate drain blocked. | Check drain, especially any external runs in freezing temperatures. |
Potterton Assure combi 30 Boiler Troubleshooting
Eror code | Description offautt |
---|
E09 | Gas valve connection cable |
E15 | Gas valve fault |
E20 | Central heating NTC fault |
E28 | Flue NTC fault |
E40 | Central heating return NTC fault |
E109 | Pre-circulation fault |
E110 | Safety thermostat operated |
E118 | Primary system water pressure too low |
E125 | Circulation fault (primary) |
E128 | Flame failure |
E130 | Flue NTC operated |
E133 | Interruption of gas supply or flame failure |
E135 | Interruption of gas supply (internal error) |
E154 | Flow / return sensor temperature test |
E160 | Fan or fan wiring fault |
E270 | Circulation fault (Dry fire) |
E321 | Hot water NTC fault |
E384 | False flame |
Potterton Derwent Prestige plus Boiler Troubleshooting
Problem | Cause |
---|
Boiler does not attempt to light. | a) Check electricity supply is available to boiler and on/off switch is illuminated. The boiler has an integral fuse. |
Control Box does not lockout. | b) Check the boiler is being called to operate. Thermostat calling lamp should be lit unless internal thermostat is satisfied or external control circuit is broken. |
c) Check overheat cut off device has not operated. |
d) Check power supply is available to control box (see wiring diagram). Replace box if faulty. |
No Ignition Spark. Pilot does not Light. Control Box goes to lockout | a) Check ignition electrode continuity for earth fault. |
b) Check power supply is available to ignitor during ignition period. |
c) Check operation of ignitor. Replace if necessary |
Ignition sparks Pilot does not Light. Control Box goes to lockout | a) Check gas supply is available at the pilot burner at the correct pressure. |
b) Check gas supply is purged of air. |
c) Check pilot injector |
d) Check ignition electrode position. |
Pilot Burner lights Control Box goes to lockout safety time | a) Check electrical supply polarity |
b) Check earth continuity to pilot burner |
c) Check pilot burner pressure is correct |
d) Check there is no earth leakage on ionisation probe circuit. |
e) Check ionisation probe circuit for correct flame current. This is achieved by connecting a DC micrometer in series. A reading of at least 7^A DC should be obtained. If this is obtained and the control box continues to lock out then replace the control box. |
Pilot Burner Lights. Main burner does not light Control Box does not lockout | a) Check main burner gas cock is open. |
b) Check electrical continuity to main gas valve |
c) Check operation of gas valve and replace if necessary |
d) Check control box. Replace if necessary |
Pilot Burner Lights Main burner lights Control box locks out. | a) Check ignition of main flame is smooth and reliable. |
b) Check voltage supply for interference. |
c) Faulty Control Box |
Potterton Envoy 30 Boiler Troubleshooting

Error code | Problem | Cause | Action |
---|
1 | Sensor | Flow or return sensor out of calibration | See chart |
2 | Flow sensor | Flow sensor is incorrectly fitted | Check sensor |
3 | Case temperature | Temperature within boiler casing too high | See chart |
4 | Dry fire | Boiler has been fired without water | Check system |
5 | Flow sensor | Sensor failed open or closed circuit | Replace sensor |
6 | Return sensor |
7 | Case sensor |
8 | Dry fire sensor |
9 | Fan speed | Fan speed incorrect | See chart |
R | Shorted signal | Flame signal shorted to ground | Check igniter etc |
C | Flame loss | Flame loss after initial detection | See chart |
E | Control failed | Control has failed | Replace control |
P | Wiring fault | Live on neutral connection | Correct fault |
Potterton Envoy Flowsure Boiler Troubleshooting
Error code | Meaning | Solution |
---|
L | Last Lockout: | This is when a lockout has occurred and the control has been reset, this event is then stored in the controls memory until another lockout occurs and is reset at which time the display is updated to reflect the new event. |
The type of lockout is shown in the Flow Temperature & Settings Display. |
For more information see the Fault Finding Chart. |
B | Last Blocking Error: | This is when a blocking error has occurred and then cleared, this event is then stored in the memory until another blocking error occurs at which time the control updates the display to reflect the new event. The type of |
Blocking Error is shown in the Flow Temperature and Settings Display. |
For more information see the Fault Finding Chart. |
G | Maximum Fan Speed: | This is normally set at 99 which is equivalent to 4680 RPM. this reading should not be changed as it affects the maximum heat output of the boiler. |
J | Minimum Fan Speed: | This is normally set at 40 which is equivalent to 2920 RPM. this reading should not be changed as it affects the minimum heat input of the boiler and may cause noise below this figure. |
F | Fan Speed Offset: | This allows the fan speed to be adjusted in 3 x 60 RPM increments above and below the nominal speed of 4680 RPM - Setting 03 on the Flow |
Temperature & Settings Display. This has been factory set to ensure that the correct air signal pressure is produced and may have been set anywhere between oo and 06. Adjustment in the range is achieved by pressing the + or - buttons whilst the F is displayed in the Status/Function Display. |
U | Control Status: | From the information below it is possible to determine the function the control is performing at any one time. This is useful when diagnosing faults, as failure to carry out a step may point to a malfunctioning component. |