5
MAINTENANCE AND FAULT FINDING PROCEDURES
WARNING: ALWAYS ISOLATE UNIT FROM THE ELECTRICAL SUPPLY BEFORE ATTEMPTING ANY REPAIRS OR
MAINTENANCE.
TROUBLESHOOTING GUIDE
FAULT CAUSE
AUTOMATIC MODELS MANUAL MODELS
A The motor does not start 1-2-3-4-5-7-17-18 1-2-3-5-7
B The heater stops and the lockout light (11) comes on 6-8-9-10-17
C The fan turns but the heater cannot be ignited 11-17-18 8-9-10-11-13-17-18
D The flame stops after letting go of the gas relay valve knob (22) 10-13-14-17
E Gas flow is interrupted. The flame extinguishes 10-11-17 10-11-17
F The heater consumes too much gas 15-16 15-16
G The heater stops completely 4-12 12
FAULT CORRECTION
THE MANUFACTURER RECOMMENDS THAT ALL REPAIRS AND MAINTENANCE WORK BE CARRIED OUT BY A QUALIFIED TECHNICIAN.
CAUSE
1. Electricity Supply is faulty
• Check the power plug is plugged in.
• Check that electricity supply is available
2. The motor is blocked/faulty
• Check and replace as necessary
3. The fan is blocked/damaged
• Check and replace as necessary
4. IF FITTED (AUTOMATIC ONLY)
The thermostat setting is incorrect
The thermostat plug is not plugged in
The thermostat/thermostat connection is loose/faulty
• Adjust thermostat accordingly
• Plug the thermostat plug into the appropriate socket
• Check and replace as necessary
5. Switch/switch connections is/are faulty/loose
• Check and replace as necessary
6. Power Socket/Extension cord/plug incorrectly wired (Phase
indicator light (73) is on)
• Rewire plug/extension cord/power socket if necessary and
check that phase indicator light is off
7. Limit thermostat is faulty
• Reset Limit thermostat (WHERE FITTED)
• Check for continuity in Limit thermostat connection
8. Gas pressure/flow absent before solenoid valve
• Check that the gas supply is on at the cylinder
• Check that the gas cylinder(s) is/are full and not ‘frozen’
• Check that the gas cock is in the open position and operating
correctly
9. Solenoid valve does not open
• Check the solenoid valve and its connection
• Adjust or replace as necessary
• Check the Limit thermostat
10. Flame detecting probe and/or ignition electrode are not adjusted
or working properly
• Check and adjust or replace as necessary
11. Inlet/outlet grill or inside of heater is dirty or partially blocked
• Check and clean as necessary
12. Limit thermostat cuts in interrupting the heater
• Reset Limit thermostat (WHERE FITTED)
• Check if the inlet/outlet grill are dirty or blocked, clean as
necessary
• Check that airflow in and out of the heater is not impeded
13. Gas relay valve/thermocouple is faulty
• Check and replace as necessary (Make sure when starting that
the Gas relay valve button is kept pressed for 30 seconds after
ignition)
14. Thermocouple is not properly adjusted
• Check thermocouple positioning and adjust accordingly
15. Pressure regulator is faulty
• Check and replace as necessary
16. There is a leak in the gas delivery line
• Immediately close gas supply at bottle. Check hose and
unions in the delivery line are tight (Use a soap solution to
locate leaks – NEVER USE A NAKED FLAME)
17. Control box faulty
• Check and replace as necessary
18. Air Proving switch (28) is faulty (WHERE FITTED)
• Check and replace as necessary
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