Technical data

Installation and Operation manual ETHOS 36C and ETHOS 54C –1511/05-issue1
Page 27
40. Plug/wire connection should point toward the outside of the fan and fall into the PCB groove on one side.
41. Check plugs and make sure that they are pressed together properly.
42. Check if the cables are damaged or jammed and replace, if necessary.
43. Check pipe connections, replace sensor.
44. Check heat exchanger seal on flue box, reinstall if necessary, install new lip ring.
45 Check all outlets and hot water pipes for leaks.
46 Set pump switch in position 3.
47 Check sensor wiring / colours; see 4.3 Wiring diagram
48 Replace fuse, if necessary (must be causing the failure); spare fuse available, see picture on par 6 Failures.
49 Replace fuse, if necessary (must be causing the failure); no spare fuse available, see picture on par 6 Failures
50 Check the voltage of the mains cord and wall socket; main fuse.
51 Check the programmed parameters on 5.5 Explanation of adjusting options for installer table 7
52 Check type of room thermostat and the label on the connectors of the appliance.
53 Modify the step programme, see 5.5.6 Programme number J6: Step modulation.
54 Modify the wake-up times in the clock thermostat.
55 Supply (of outlet water) on the left side of the appliance; return on the right.
56 Push the four-core cable with mini plug in the three-way valve motor; check the three cables.
57 Check if this sensor is installed properly.
58 Adjust with an appropriate Allen key (8 mm).
59 The appliance must be drained at the central heating side and at the sanitary water intake side.
The coil can be removed from the appliance after removing the two T-pieces on each side of the coil by using
the flat couplings.
Remove the mounting bracket at the bottom of the coil.
Sanitary water flows between inner and outer tube of the DHW heat exchanger. This might be scaled or dirty;
this section must be flushed.
60 The printed circuit board connector is probably not installed properly, which means that the wiring
communicates with the wrong pins: check both the left and right side of the printed circuit board connector to
determine whether the connector(s) are installed properly.
61 A gas control valve failure usually has two causes: the electric coils are defective or the gas valve has an
internal defect; in both cases the entire gas valve must be replaced.
62 The boiler control can be adjusted by using special service software. If the modified parameters are
programmed, this confirms that the boiler control has accepted the new parameters.
63 Use the proper software (check!) for programming and do not exceed the threshold values; try to reprogram.
64 Check the supply voltage; if the voltage is correct (between 190 and 250 volt), replace the burner control unit.
65 To check the operation of the Info button. Remove the display from the plastic spacers and check if it functions
properly. If not, replace the display. If the display is functioning properly outside the appliance, check whether
there is enough room for the button in the plastic cover (the button might be blocked). If necessary, make more
room for the button.
66 Check the installation menu settings: enter ‘0’ in programme line 1.
67 Check the operation and filters of the ventilation system; check the cable connection between boiler and
coupling. (NOT APPLICABLE FOR UK boilers)
68 Adjust the water restrictor cock value as described in table 4, page 10. (only Ethos 36C)