Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-355-7995 www.hayward-pool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
42
Code Fault
Diagnosis Step
Remedy
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 is between the minimum and
maximum values indicated on rating plate. If OK, proceed to step 3.
3. Check for faulty
fl
ame
sense wiring or connection.
Inspect
fl
ame sense wiring. Ensure wire harness terminals are
securely fastened to
fl
ame sense and to 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 igintion. If
24VAC is present and gas valve does not open, gas valve is defective.
Replace gas valve.
2. If 24VAC is not present, gas valve relay on control module is
defective. Replace control module.
6. Check for blockages in
gas ori
fi
ces and burners
Inspect gas ori
fi
ces for blockages which could prevent gas
fl
ow.
Remove and inspect burners for blockages.
AC
Blower vacuum
switch closed.
1. Check for defective
blower on relay or control
module.
Disconnect Blower plug fron Control Module. With heater off,
measure continuity across pins 1 and 2 of receptacle on Control
Module. If closed, control module relay is defective. Replace control
module. If OK, proceed to step 2.
2. Vacuum switch is
defective.
Replace blower vacuum switch.
AO
Blower vacuum
switch open.
1. Check for faulty vacuum
switch tubing
Check tubing and replace if necessary. If OK, proceed to step 2.
2. Check for faulty vacuum
switch wiring or connection.
Inspect vacuum switch wiring. Ensure wire harness terminals are
securely fastened to spade terminals on vacuum switch. If OK,
proceed to step 3.
3. Check for faulty blower
wiring or connection
Inspect blower wiring. Ensure plug on blower is securely fastened to
control module. If OK, proceed to step 4.
4. Check for defective
vacuum switch
Disconnect Blower plug from Control Module. Measure resistance
across Blower windings. Winding resistance across lead should be
in the following range; Black-to-White: 4 to 5 ohms. If measured
values vary substantially from these values, Blower is defective.
Replace. If OK, proceed to step 5.
5. Check for defective
blower relay.
Disconnect Blower plug from Control Module. Place heater in Pool
or Spa Mode. Raise set point temperature to generate call for heat.
During pre-purge period, measure for 120VAC across pins 1 and 2.
If 120VAC is not present, control module relay is defective. Replace
control module. If OK, proceed to step 6
6. Vacuum switch is
defective
Replace blower vacuum switch.
bO
Bypass
Operation
1. Check to see if Control
Module is in Bypass
Operation
This is normal display when heater is being controlled by a remote
thermostat. No service is required. If heater is not being controlled
by remote thermostat, change setting by using the MODE key to put
the heater into STANDBY. Press and hold the DOWN key and then
press and hold the MODE key. Hold down both keys for 3 seconds
until the indication ‘‘bO’’ is removed from the display.
Figure 222:
TROUBLESHOOTING
(continued)
