Troubleshooting Guide; Fault Correction - Jetfire J8 Operating & Maintenance Manual

WARNING: ALWAYS ISOLATE UNIT FROM THE ELECTRICAL SUPPLY BEFORE ATTEMPTING ANY REPAIRS OR
MAINTENANCE.
FAULT
A The motor does not start
B The heater stops and the lockout light (11) comes on
C The fan turns but the heater cannot be ignited
D The flame stops after letting go of the gas relay valve knob (22)
E Gas flow is interrupted. The flame extinguishes
F The heater consumes too much gas
G The heater stops completely
THE MANUFACTURER RECOMMENDS THAT ALL REPAIRS AND MAINTENANCE WORK BE CARRIED OUT BY A QUALIFIED TECHNICIAN.
CAUSE
1. Electricity Supply is faulty
2. The motor is blocked/faulty
3. The fan is blocked/damaged
4. IF FITTED (AUTOMATIC ONLY)
The thermostat setting is incorrect
The thermostat plug is not plugged in
The thermostat/thermostat connection is loose/faulty
5. Switch/switch connections is/are faulty/loose
6. Power Socket/Extension cord/plug incorrectly wired (Phase
indicator light (73) is on)
7. Limit thermostat is faulty
8. Gas pressure/flow absent before solenoid valve
9. Solenoid valve does not open
10. Flame detecting probe and/or ignition electrode are not adjusted
or working properly
11. Inlet/outlet grill or inside of heater is dirty or partially blocked
12. Limit thermostat cuts in interrupting the heater
13. Gas relay valve/thermocouple is faulty
14. Thermocouple is not properly adjusted
15. Pressure regulator is faulty
16. There is a leak in the gas delivery line
17. Control box faulty
18. Air Proving switch (28) is faulty (WHERE FITTED)
MAINTENANCE AND FAULT FINDING PROCEDURES

TROUBLESHOOTING GUIDE

FAULT CORRECTION

CAUSE
AUTOMATIC MODELS
1-2-3-4-5-7-17-18
6-8-9-10-17
11-17-18
10-11-17
15-16
4-12
• Check the power plug is plugged in.
• Check that electricity supply is available
• Check and replace as necessary
• Check and replace as necessary
• Adjust thermostat accordingly
• Plug the thermostat plug into the appropriate socket
• Check and replace as necessary
• Check and replace as necessary
• Rewire plug/extension cord/power socket if necessary and
check that phase indicator light is off
• Reset Limit thermostat (WHERE FITTED)
• Check for continuity in Limit thermostat connection
• 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
• Check the solenoid valve and its connection
• Adjust or replace as necessary
• Check the Limit thermostat
• Check and adjust or replace as necessary
• Check and clean as necessary
• 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
• Check and replace as necessary (Make sure when starting that
the Gas relay valve button is kept pressed for 30 seconds after
ignition)
• Check thermocouple positioning and adjust accordingly
• Check and replace as necessary
• 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)
• Check and replace as necessary
• Check and replace as necessary
MANUAL MODELS
1-2-3-5-7
8-9-10-11-13-17-18
10-13-14-17
10-11-17
15-16
12
5