Hayward H250FDN Support and Manuals
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Popular Hayward H250FDN Manual Pages
Universal H Series Troubleshooting Guide - Page 3
... and Electrical Connections
9-11
How To:
Pg. 12-17
Program Heater Bypass & Temperature Lockout
13-15
Test/Adjust Gas Pressure
16-17
Troubleshooting:
Pg. 18-64
Diagnostic Codes and Part Numbers
19-20
1. "IO" or "SB" Code 8. "AC" Code
56-57
14. "SF" or "HS" Code 9. Heater not powering up
21-26
2. "BD" Code
34-35
6. "EE" or "CE...
Universal H Series Troubleshooting Guide - Page 19
... reversed, low voltage detected Keypad failure Temperature Sensor (thermistor) input failure
19 Troubleshooting Steps for the UHS Heater. Maximum return water temperature exceeded and / or rapid water temperature rise. Diagnostic Codes
Below is a list of all Diagnostic Codes for each Code are covered on the following pages.
Diagnostic Code
AC AO BD CE EE HF HS IF IO...
Universal H Series Troubleshooting Guide - Page 27
NO
Install correct plug and
replace fuse
YES
Did this correct the
problem?
NO
Is transformer YES
wiring damaged, pinched, or worn? NO
Test transformer resistance
Is resistance
YES
correct?
NO
Correct/repair transformer
wiring
Contact Support (908) 355-7995
Replace transformer: IDXL2TRF1930
27
Open FC1 &/or F2 Fuse
Open FC1 &/or F2 Fuse
Problem solved
Correct voltage...
Universal H Series Troubleshooting Guide - Page 36
... connection
Secure connections
& retest
Problem solved
Contact Support (908) 355-7995 Service LED ON: "EE" OR "CE" Code
"EE" OR "CE" Code
Check display for "EE" code
Is "EE" code YES
present? NO
Go to section B
The "CE" code may clear with a reset of power, power cycle
the heater
YES Did the "CE"
code clear?
6.
NO
Replace display/bezel/
keypad: (See...
Universal H Series Troubleshooting Guide - Page 40
...
differ by more than 1°? NO
Replace thermistor: FDXLTER1930
Plumb correctly in compliance with installation manual
8.
NO
The "HS" code stands for "SF" code
YES
Ohm thermistor, checking each red to
black, do the readings
differ by more than 1°? Service LED ON: "SF" OR "HS" Code
"SF" OR "HS" Code
Check display for High Sense (water temperature...
Universal H Series Troubleshooting Guide - Page 44
... YES
manifold gas pressure?
Service LED ON: "HF" Code
"HF" Code
Power cycle the heater at the breaker
Does heater YES
fire?
NO
NO
Verify error code & jump to section that best describes error
Replace gas valve: Please refer to (pg. 20)
44
Reduce the temperature set point until heater
stop firing
Problem solved
Did the "HF" YES
code reappear? NO
Test for...
Universal H Series Troubleshooting Guide - Page 46
... sufficient?
YES
NO
NO
NO
Increase flow rate/clean filter
Replace wire harness:
FDXLWHA1930
Replace water pressure switch: FDXLWPS1930
Go to section B (next page)
YES Is this heater
installed indoors? Heater made after Feb. 2016?
NO
Contact Support (908) 355-7995
Did error YES
clear? Service LED ON: "LO" Code
"LO" Code
Verify adequate water flow, is continuity present? Verify high...
Universal H Series Troubleshooting Guide - Page 47
11.
NO
Inspect flue and vent sizing
Repair or replace tube kit:
IDXL2SNT1930
YES Continuity
present?
Service LED ON: "LO" Code
Section B (continued from previous page)
YES Heater made
after Feb. 2016?
NO YES Vent sized
correctly? NO
Replace vent pressure switch: FDXLVPS1930
Replace exhaust gas limit switch: FDXLEGL1931
YES
Is flue dirty?
NO
47
Inspect vent pressure switch...
Universal H Series Troubleshooting Guide - Page 50
... may result in the heater's Installation Manual/Indoor Vent Instructions.
IF
OK, go to heater OR COULD PUT
INHABITANTS AT SERIOUS RISK. IF NOT, contact installer. 11. Inspect flue and vent sizing
Step 11G
Vent pressure switch continuity
Step 11H
Ensure that the vent size is not blocked or restricted. Service LED ON: "LO" Code (cont.)
Note: Please ensure...
Universal H Series Troubleshooting Guide - Page 51
Service LED ON: "LO" Code (cont.)
Note: This switch is a one time safety. Indoor/Outdoor: Feb. 2016 and newer
Step 11I
Test continuity across the exhaust gas limit switch. IF switch does not exist AND problem still persists, contact support: (908) 355-7995
51 IF open, replace switch (pg. 20). 11. Once the switch has tripped then...
Universal H Series Troubleshooting Guide - Page 53
...: FDXLBRN1930 OR Gas Valve
(includes orifices): (pg. 20)
YES Are burner tubes &
orifices damaged?
Service LED ON: "IF" Code
Section B (continued from previous page)
Is correct flame YES
sensor installed OR damaged?
NO
Contact tech support:
(908) 355-7995
53 NO
Replace flame sensor:
IDXLFLS1930
Check for damaged OR wrong blower
air inlet plate
NO
Is plate
YES
damaged...
Universal H Series Troubleshooting Guide - Page 54
...IF NOT,
open gas supply. IF NOT, rotate knob to Step 12F. Flame sensor & gas valve
Step 12C
Verify that the gas valve, inside the heater, is in the "ON" position. IF correct, proceed to
step 12D.
... 12D
Ensure both flame sensor and gas valve are correct (See Page 16 & 17). IF
NOT, go to the ICB. 12. IF OK, go to ON position.
Service LED ON: "IF" Code
Inspect main gas supply...
Universal H Series Troubleshooting Guide - Page 55
... air inlet plate
Step 12G
Verify that the installed flame sensor is damaged, replace it with the 5" version (pg. 20). IF OK, go to step 12H.
55
Inspect Gas Orifices & Burners for damaged/wrong blower air inlet plate. 12. Otherwise, replace ICB (pg. 20).
Service LED ON: "IF" Code (cont.)
Voltage/pressure off gas valve
Step 12E...
Universal H Series Troubleshooting Guide - Page 58
...pg. 20)
Is vacuum tube YES
damaged? NO
Correct voltage YES
selector plug?
Service LED ON: "AO" Code
"AO" Code
Replace blower vacuum switch: FDXLBVS1930
Is blower YES
damaged?
NO
Install correct plug and
replace fuse
Replace blower vacuum switch: FDXLBVS1930
Replace ICB: FDXLICB1930
58
Replace vacuum tubing: IDXL2SNT1930
Ohm out blower for 4-5ohms
(after Sept. 2010), is
voltage...
uhs_qrg_20f0 - Page 2
... IF - STANDBY SPA POOL
Max Pool Temp Limit is Pre-set To Energy-saving 90 F, See Owner's Manual.
Programming
Diagnostic Codes:
AC - Blower vacuum switch open LO - Flame present with gas valve not energized HS - Hold
& MODE for 3 seconds
for Spa; SPA LED indicates max temp for 'bo' to place heater in
'STANDBY' Mode.
SERVICE
STANDBY
HEAT
SPA
Press...
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