Installation Guide

Pomona, CA Clemmons, NC Nashville, TN
Tel: [phone] www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
50
Code Description Information
bD
Internal fault/power-up
error
On initial trial for ignition. Automatic reset is immediate once the gas valve relay
check results are acceptable.
bD
Gas valve sensed
as “ON” error
If valve is open when it should be closed the heater will shut down and go into
lockout. Blower will operate until error condition is corrected. Automatic restart
2 minutes after error is corrected.
bD
Gas valve sensed
as “OFF” error
If valve is closed but ame is sensed the blower will run for 5 s then start a new
ignition sequence. If error occurs 10 times during a call for heat the control will
go into lockout. Automatic reset is 60 minutes.
bD Data retrieval error If control input data is corrupted the heater will shut down and go into lockout.
HF
Flame present with gas
valve “OFF” error
If ame is sensed with the gas valve off the control will go into lockout. The
blower will run until error condition is corrected. When corrected, control will
run blower for 5 s then automatically restart after 2 minutes.
PF
Electrical supply wiring
error
This code will display if 120V polarity is reversed, low voltage is detected, or if
the ground path is not sufcient. Reset is immediate after error is corrected.
AO
Blower vacuum switch
open error
If the blower prover switch does not close after the blower starts the control will
stop the ignition trial go into lockout. The blower will continue to run. Automatic
reset is immediate after the switch closes.
AO
Blower vacuum switch
open when expected
closed error
If the blower prover switch opens unexpectedly during operation the control will
shut down and attempt to re-light. If the switch does not close after the blower
starts the control will go into lockout with the blower running. Automatic reset is
immediate after error is corrected.
AO
Blower vacuum switch
open during post-purge
error
If the blower prover switch opens during the postpurge cycle (heater is not r-
ing) the control will display the error code. The post-purge cycle will be com-
pleted once the blower prover switch closes.
AC
Blower vacuum switch
closed when expected
open error
If the blower prover switch is closed before blower start-up the control will not
start the blower. Automatic reset is immediate when the switch opens.
IO
Igniter open error If the control is not in lockout and senses that the igniter circuit is open when the
blower is running the control will turn off the blower and go into lockout. Auto-
matic restart 2 min after error is corrected.
SF
Thermistor error An excessive temperature difference between the two thermistors (5 °F or more)
or an “out of bounds” condition on both sensors (less than 10°F or greater than
180°F) will result in the error code. Automatic restart is 2 minutes after the error
is corrected.
Figure 31: ERROR CODES