Hayward H300 User Manual

39
SECTION 7. TROUBLESHOOTING
Troubleshooting Chart:
H-SERIES HEATER DIAGNOSTIC GUIDE
CODE FAU LT DIAGNOSIS STEP REMEDY
BO Bypass Operation
1. Check state of #2 dip
switch on back of control
module.
This is a normal display when heater is being controlled by a remote ther-
mostat. No service is required. If heater is not being controlled by remote
thermostat, change setting of #2 dip switch to “Off” position.
IF Ignition Failure
1. Ensure gas supply shutoff
valves are open.
Ensure that main gas shutoff installed adjacent to heater is open. Ensure
that knob on gas valve inside unit is in “On” position. If OK, proceed to
step 2.
2. Check for low gas supply
pressure.
Ensure inlet gas supply pressure exceeds minimum value indicated on
rating plate. If OK, proceed to step 3.
3. Check for faulty igniter wir-
ing or connection.
Inspect igniter wiring. Ensure igniter plug is securely plugged into back of
control module. If OK, proceed to step 4.
4. Check for faulty gas valve
wiring or connection.
Inspect gas valve wiring. Ensure wire harness terminals are securely
fastened to spade terminals on gas valve. If OK, proceed to step 5.
5. Check for gas valve failure
or gas valve relay failure.
1. Measure voltage across gas valve during trial for ignition. If 24 vac is
present and gas valve does not open, gas valve is defective. Replace
gas valve.
2. If 24 vac is not present, gas valve relay on control module is defective.
Replace control module.
SF
Temperature Sensor
Input Failure
1. Check for faulty wiring or
connection.
Inspect sensor wiring. Ensure sensor is plugged into back of control
module. If OK, proceed to step 2.
2. Sensor is defective. Replace temperature sensor.
HS
Maximum Return
Water Temperature
Exceeded
1. Pool water temperature
exceeds 104ºF.
Verify set point setting of remote thermostat is at or below 104ºF. If set
point setting of remote thermostat is OK, or if heater is not congured for
remote thermostat proceed to step 2.
2. Verify that water ow is
adequate.
Verify that water ow rate to heater is above minimum required.
HF Flame Sense Fault 1. Flame sense failure. Replace igniter.

Hayward H300 Specifications

General

Model	H300
Heat Exchanger	Cupro Nickel
Ignition	Electronic
Control	Digital
Minimum Flow Rate	20 GPM
Maximum Working Pressure	50 PSI
Type	Natural Gas/Propane
BTU Input	300, 000 BTU
Water Connections	2"