Balanced Flue And Open Flue Models; Comblcompact; Thermocompact; Vcw221, 240, 280 - Vaillant COMBlcompact VCW 242E Troubleshooting Manual

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HEATING,CONTROLS, H OTWATER.
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Balanced Flue and Open Flue Models
COMBlcompact VCW221 , 240, 280
THERMOcompact VC11 0, 180, 240, 221
Red Rocker switch - Set to ON position
Heating Switch
- Set to ON position (VCW only)
Circulating Pump - Operating mode position one (I) (see guidance note 6)
~
First check central heating operation (All external controls on)
11
Can pilot light be lit and
established?
I~NO~
(a) Check gas supply to
appliance live and purged.
(b) Check pilot injector,
burner and supply tubes.
... Pic33
(d) Check thermocouple
and connections.
... Pic35
~
+
YES
+
~
(c) Check piezo ignitor,
leads and electrodes.
... Pic34
(e) Check central heating
overheat thermostat and
connections (should be
closed circuit, if open
change component).
Refer to Pic 22
(f) If intermittent pilot
outage occurs check flue
integrity (balanced flue)
ventilation or draughts
(open flue).
Go to 2
9