55
Figure 28:
TROUBLESHOOTING
Code
Fault
Diagnosis Step
Remedy
bD
Bad Board or
Secondary Hig
Voltage Fault
1. Verify that FC4 Fuse on
Fuse Board is not open.
Remove FC from fuseholder. Mesure continuity across fuse.
If OK, reinstall fuse and proceed to step 2. If Fuse is open,
proceed to section titled ‘‘Open FC4 Fuse’’.
2. Verify high voltage
output from Fuse Board.
Disconnect plug from P6 connector of Fuse Board. Measure
for 120VAC across pins 3 and 5 of P6 receptacle on Fuse
Board. If OK, reconnect plug and proceed to step 3. If not
OK, go to step 4.
3. Check for defective
Harness.
Disconnect plug from E10 connector of Contol Module.
Measure for 120VAC across pins 1 and 3 of Plug on Harness.
If OK, replace Control Module. If not OK, replace Harness.
4. Check for defective
Transformer.
Disconnect plug from P4 connector of Fuse Board. Measure
for 120VAC between pins 4 and 6 of plug from Transformer.
If OK, proceed to step 5. If not OK, replace Transformer.
5. Fuse Board is defective Replace Fuse Board.
EE
Bad Board
1. Defective Control
Module
Replace Control Module.
CE
Communicat-
ion Error
between
Control
Module
and Display
Interface
Assembly
1. Disconnect and then re-
connect power to heater.
2. Check for faulty wiring
or connection.
Inspect Display Interface Wiring. Ensure Display Interface
Plug is securely attached to Control Module. If OK, proceed
to step 2.
3. Control Module and/
or Display Interface
Assembly are defective.
Replace Control Module and/or Display Interface Assembly.
IO
Igniter Failure
1. Check for faulty wiring
or connection.
Inspect Igniter wiring. Ensure Igniter Plug is securely attached
to Control Module. If OK, proceed to step 2.
2. Igniter is defective
Replace Ignitier.
Sb
Keypad Failure 1. Keypad is defective
Replace Display Interface Assembly.
SF
Temperature
sensor input
failure
1. Check for faulty wiring
or connection.
Inspect sensor wiring. Ensure sensor is pluggd into back of
control module. If OK, proceed to step 2.
2. Sensor is defective
Replace temperature sensor.
HS
Water
Temperature
Sensing Error
1. Check remote
thermostat setting
Verify set point setting of remote thermostat is at or below
104°F. If set point of remote thermostat is OK, or if heater is
not confi gured for remote thermostat, proceed to step 2.
2. Verify that the water
fl ow is adequate
Verify that water fl ow to heater is above minimum required
(20 GPM for H150FD and H200FD, 25 GPM for H250FD
and H300FD, 30 GPM for H350FD and H400FD). Note that
intermittent periods of low water fl ow will cause this error. If
OK, proceed to step 3.
3. Check inlet water
temperature sensor
Compare the heater's temperature reading to the pool water
temperature with an accurate thermometer. If signifi cantly
different, replace inlet water temperature sensor.