Service manual

G.Fire Service Manual 29 Issue A — © Masport, March 2004
2. Switch the HI / LO switch on the fascia to HI. Check for 230 volts across 2 & 3 (or 5 & 6) in the
control box. If dead, check the 5 - core loom and its connections between the control box and the
switch cluster. If the voltage at 2 & 3 is OK, and the modulator coil resistance is correct, the
modulator lead from the control box to the modulator coil is faulty.
SIX PIN CONNECTOR
NINE PIN CONNECTOR
CONTROL BOX
Red Red Red
White White Violet
BlackBrown (6.3)
Brown (Str) Yellow
Red (Str) Blue
Brown (4.8) Brown
BlueBlue
Y/Gn Y/Gn
Y/Gn Y/Gn
Brown Brown
Y/Gn Y/Gn
Five core
cable to
switches
Three core
cable to
gas valve
Fan
loom
To valve
body
8
10
14
4
2
7
EIS CONNECTOR DIAGRAM
7.4 FAN WILL NOT RUN. Remember, if a Thermodisc is fitted to the heater, the fan will not start
until the heater has been running for at least ten minutes.
1.
Check for
mains voltage at the six-pin connector with
the fascia fan switch at its various positions. If correct,
go to step 3.
2.
If faulty, check the 5-core lead between the control box
and the switches on the fascia. Particularly check the
connections to the fan switch, and check the action of
the switch toeliminate a faulty switch.
SIX PIN FAN CONNECTOR
LOOKING INTO FEMALE
METAL SOCKETS
EMPTY
PHASE
LOW
EARTH
HIGH
3. If a Thermodisc is fitted, disconnect the leads at the terminals of the Thermodisc and fit a jumper
wire between the leads. If this clears the fault, the Thermodisc is faulty, but remember the warm-up
period for the Thermodisc mentioned above.
4. With the jumper wire across the Thermodisc leads still in place, check for continuity in the fan
wiring from phase to LOW and from phase to HIGH at the male pins of the six pin connector.
Discontinuity could be in the fan loom, or failing that, in the windings of the fan motor itself.