Model LC (Australia) Pool and Spa Heater
Page 13
4C. Electrical Troubleshooting
An authorized service technician, qualified in
pool heater maintenance, should do all troubleshooting
and repairing on the LC (Australia) heater. Before
calling a service technician, the heater owner can check
the following:
1. Be sure the system pump is operating and the
filter is clean.
2. The heater circuit breaker and/or disconnect
switch must be ON, and the switch on the heater
control panel must be pointing at one of the tempera-
ture control knobs.
Figure 17. Gas Pressure Test Procedures
TESTING MAIN LINE GAS PRESSURE
1.
Attach the manometer* to the heater jacket.
2.
Open both columns on the manometer.
3.
Use the shut-off valve outside the heater jacket to shut off
all gas supply to the heater.
4.
Remove the cap screw from the gas fitting on the INPUT side
of the gas valve.
5.
Attach one end of the manometer hose to the fitting on the
gas valve and the other end to the manometer.
6.
Open gas supply valve to the heater and set the thermostat
high enough to call for heat.
7.
Move the rotary switch to POOL or SPA. This should activate
the main burners.
8.
With the main burners firing, the manometer reading should
be between 1.13 and 1.75 kPa (natural gas) and between
2.5 and 2.75 kPa (propane gas).
9.
Move the rotary switch to OFF and refer to Lighting and
Shutdown label to shut down the system.
10. Disconnect the manometer tubing from the gas valve and
replace screw on the gas fitting.
TESTING MANIFOLD GAS PRESSURE
1.
Attach the manometer* to the heater jacket.
2.
Open both columns on the manometer.
3.
Use the shut-off valve outside the heater jacket to shut off
all gas supply to the heater.
4.
Remove the cap screw from the gas fitting on the OUTPUT
side of the gas valve.
5.
Attach one end of the manometer hose to the fitting on the gas
valve and the other end to the manometer.
6.
Wait five minutes.
7.
Open gas supply valve to the heater and set the thermostat
high enough to call for heat.
8.
Move the rotary switch to POOL or SPA. This should activate
the main burners.
9.
The manometer reading should be 1.0 kPa for natural gas
and 2.25 kPa for propane gas.
10. Move the rotary switch to OFF and refer to Lighting and
Shutdown label to shut down the system.
11. Disconnect the manometer tubing from the gas valve and
replace screw on the gas fitting.
*A dry gas pressure gauge may be used for either test.
3. All external manual gas valves must be open,
and the heater's gas valve must be in the ON position.
4C-1. Control System Troubleshooting
Sequence
A. Heater Does Not Come On
IMPORTANT:
Disconnect power to the heater before
removing or replacing any component or wire connec-
tion. If the power is not disconnected, "jumpering" the
gas valve or accidental grounding of the wire harness
or component terminals to the heater frame or jacket
could cause the fuse to blow.
