www.johnsonandstarley.co.uk
20
BASIC MODELS
5
Pilot alight but main burner not
igniting
Mains electrical supply not
connected to heater
Check mains supply.
Controls not demanding heat
Check that time control and room
thermostat are operating correctly.
T3.15A fuse failed.
Replace. If failure occurs again,
check wiring for short circuits.
Loose connection to room
thermostat, limit switch, gas
control lead, time control, or
transformer.
Check connections.
230V/24V transformer failure.
Check 24V side with test meter,
if voltage missing, replace
tranSformer.
Faulty relay module
Check 230V at white wire from
switch S5
Multifunctional Control faulty.
Replace Multifunctional Control.
Limit switch faulty.
Short circuit control and replace if
necessary.
Room thermostat or external wiring
faulty.
Fit temporary loop in heater
thermostat socket. If heater ignites,
external circuit or room thermostat
is faulty.
Spillage device faulty
Check Spillage device and wiring
for open circuit.
6
Main burner lights but
fan fails to run after
approximately 3 min.
Loose electrical connection at fan
control.
Check connections.
Fan Delay Control faulty.
Replace.
Faulty fan assembly.
Replace, taking care not to
damage impeller.
Burner pressure setting incorrect.
Check gas rate and burner
pressure setting
7
Main burner operating with
intermittent fan operation.
Gas rate or burner pressure
setting too low.
Check gas rate and burner
pressure setting
Fan Delay Control faulty
Replace.
8
Noisy operation.
Gas pressure too high.
Check burner pressure setting.
Noisy fan motor.
Replace fan assembly.
Fan speed setting too high.
Adjust fan speed.
9
Fan runs for excessive period
or operates intermittently after
main burner shuts down.
Fan delay control faulty.
Replace.
16.3 The
SYSTEM E-T
module is fitted with a diagnostic light
emitting diode (LED) which is visible through a hole in
the module cover, as shown in Fig. 4 below. If the LED is
flashing, this means that :
18.3.1 The fan is not connected, or
18.3.2 The capacitor is not connected, or
18.3.3 There is a short circuit in the fan supply.
19.
FAULT FINDING
FIGURE 9. SYSTEM E-T CONTROL PANEL
DIAGNOSTIC LED
FIGURE 9. DEFECT DIAGNOSIS
Summary of Contents for 42-451-09
Page 23: ...23 Sales Spares Replacement Help Line 01604 762881 MAIN BURNER NOT OPERATING...
Page 25: ...25 Sales Spares Replacement Help Line 01604 762881 FIGURE 13 BASIC FUNCTIONAL DIAGRAM...
Page 26: ...www johnsonandstarley co uk 26 FIGURE 14 SYSTEM E T CONTROL CIRCUIT DIAGRAM 21 LOGIC DIAGRAM...
Page 27: ...27 Sales Spares Replacement Help Line 01604 762881 FIGURE 15 BASIC CONTROL CIRCUIT DIAGRAM...
