Buderus 500 - 24/C, Руководство по обслуживанию

Страница: 10 / 80

Servicing manual user guide 2
We reserve the right to make technical modifications Buderus Ltd. • http://www.buderus-domestic.co.uk
10 Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2006
2 Servicing manual user guide
box 9
This document consists of various
sections
. These in turn
contain
subsections/boxes
in the form of text or tables.
Subsections/boxes inside text and tables are identified by a
small grey box. Each subsection/box is assigned its own
identification number.
These subsections/boxes are divided into
operating
steps.
If an operating step involves the taking of a yes/no decision,
the right-hand side of the table indicates which
subsection /
operating step
you should proceed (cross reference).
Diagnosis 6
We reserve the right to make technical modifications Buderus Ltd • http://www.buderus-domestic.co.uk
24 Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2005
step 28 Check the actuation of the servomotor of the internal three-way valve, see box 186.
step 29 Does the servomotor of the internal three-way valve start up correctly? Yes:
o
step 30
No:
o
step 31
step 30 Replace the servomotor of the internal three-way valve, see box 191.
o
box 43
step 31 Check the power supply cable of the internal three-way valve, see box 192.
step 32 Is the power supply cable of the internal three-way valve in good condition? Yes:
o
box 42
No:
o
step 33
step 33 Replace the cable loom (or the affected part thereof).
o
box 43
step 34 Check the movement of the servomotor of the Buderus 24V AC external three-way valve,
see box 212.
step 35 Does the servomotor of the Buderus 24V AC external three-way valve operate correctly? Yes:
o
step 36
No:
o
step 39
step 36 Check to ensure that the the Buderus 24V AC external three-way valve has been fitted correctly,
see box 228.
step 37 Has the Buderus 24V AC external three-way valve been fitted correctly? Yes:
o
step 45
No:
o
step 38
step 38 Install the Buderus 24V AC external three-way valve correctly, see box 228.
o
box 43
step 39 Check to ensure that the Buderus 24V AC external three-way valve is actuated correctly,
see box 213 and box 229.
step 40 Does the Buderus 24V AC external three-way valve actuate correctly? Yes:
o
step 41
No:
o
step 42
step 41 Replace the servomotor of the Buderus 24V AC external three-way valve, see box 218.
o
box 43
step 42 Check the wiring of the Buderus 24V AC external three-way valve, see box 221.
step 43 Is the wiring of the Buderus 24V AC external three-way valve in correct condition? Yes:
o
step 47
No:
o
step 44
step 44 Replace the wiring of the Buderus 24V AC external three-way valve.
o
box 43
step 45 Check the drive mechanism of the Buderus 24V AC external three-way valve, see box 222.
step 46 Is the drive mechanism of the Buderus 24V AC external three-way valve working correctly? Yes:
o
box 42
No:
o
step 47
step 47 Replace the internal components of the Buderus 24V AC external three-way valve, see box 225.
o
box 43
step 48 Check the wiring of the Buderus 24V AC external three-way valve between the connection box or
moving plug-and-socket connection and the control panel as per box 288.
box 25
On combi boiler supply: hot water available, but no heating operation.
On system boiler supply: no heating operation.
Hot water may be available, but no heating operation.
step 1 Check to ensure that the power supply cable to the RTH converter/Junction box has been installed correctly,
see box 286.
step 2 Is the 230V connection to the RTH converter/Junction box fitted correctly? Yes:
o
step 4
No:
o
step 3
step 3 Correctly attach the switch live to terminal 1 and Neutral to terminal 2 on the 230V connector, see box 286.
step 4 Disconnect black leads from terminals 1 & 2 on the back of the DBA and test for continuity between the two
leads.
No continuity check S/L and N connections are made correctly and that there is 230v between the two.
Replace RTH converter/Junction box.
Continuity reconnect the cables to terminals 1 & 2 and check the connections between the terminals and
the DBA.
o box 43
box 24
Section
Subsection/box
Cross reference to subsection
or operating step
Operating step number
Explanation of this subject starts in this box.
The following boxes can be relevant as well.