Hayward 150 - Page 42

42 USE ONLY GENUINE REPLACEMENT PARTS
51300004201B
Table16: Display Code Index
NOTE: Continuation of control sequence is immediate after error is corrected. Automatic
reset may take up to 2min for control self-diagnostics to complete. Lockout recover may
take up to 60 min.
HS
High temperature
sensing error
A) Inlet water temperature sensor is reporting a temperature in excess of
104°F. Normal operation resumes 2 minutes after inlet water temperature
sensor reports temperatures of 104°F or less. This error functions for both
normal and remote thermostat modes. or
B) Inlet water temperature sensor is reporting a temperature change at a rate
faster than 6°F in 60 seconds or less while the heater is firing, indicating a
potentially damaging low water flow condition. Normal operation resumes
when temperatures stabilize. If this condition is detected 3 times in a one hour
period, the heater will lockout.
IF
Ignition failure
error
If the maximum number of ignition retries is exceeded, the heater will shut
down and go into lockout. Automatic reset is 60 minutes.
IO
Igniter open error
If the ignition control board is not in lockout and senses that the igniter circuit is
open when the blower is running the ignition control board will turn off the
blower and go into lockout. Automatic restart 2 min after error is corrected.
LO
Limit string open
error
If the limit string opens the heater shuts down and goes into lockout. Automatic
restart is 2 minutes after the error condition is corrected and the limit string
closes.
PF
Electrical power
supply wiring error
This code will display if supply power polarity is reversed, low voltage is
detected, or if the ground path is not sufficient. Reset is immediate after error is
corrected.
Sb
Keypad stuck
button error
If one of the keypad buttons is closed (or pressed) for more than 30 s the unit
will shut down. The error code will be cleared when the condition is corrected.
SF
Temperature.
sensor failure
error
If an excessive temperature difference between the redundant thermistors (5
°F or more) or a sensor “out of bounds” condition with either thermistor (less
than 10°F or greater than180°F) will result in unit shut down and the error code
displayed. Automatic restart is 2 minutes after the error is corrected.