Universal H Series Troubleshooting Guide
Page 3
"HF" Code 44-45 11. "AO" Code 58-60 Heat Exchanger: Flow requirements 61 Heat Exchanger: Inspection 62 Heat Exchanger: Potential Failure Causes 63 UHS Wiring Schematic 64 UHS Wiring Diagram 65 3 Open FC4 Fuse 32-33 5. "AC" Code 56-57 14. Open FC3&/F1 Fuse 29-31 4. "PF" Code Pg. 18-64 ...38-39 40-41 42-43 10. "LO" Code 46-51 12. "IF" Code 52-55 13. Open FC1&/FC2 Fuse 27-28 3. "EE" or "CE" Code 36-37 Troubleshooting (cont.): 7. "SF" or "HS" Code 9. "IO" or "SB" Code 8. Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of ...
"HF" Code 44-45 11. "AO" Code 58-60 Heat Exchanger: Flow requirements 61 Heat Exchanger: Inspection 62 Heat Exchanger: Potential Failure Causes 63 UHS Wiring Schematic 64 UHS Wiring Diagram 65 3 Open FC4 Fuse 32-33 5. "AC" Code 56-57 14. Open FC3&/F1 Fuse 29-31 4. "PF" Code Pg. 18-64 ...38-39 40-41 42-43 10. "LO" Code 46-51 12. "IF" Code 52-55 13. Open FC1&/FC2 Fuse 27-28 3. "EE" or "CE" Code 36-37 Troubleshooting (cont.): 7. "SF" or "HS" Code 9. "IO" or "SB" Code 8. Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of ...
Universal H Series Troubleshooting Guide
Page 19
Diagnostic Code AC AO BD CE EE HF HS IF IO LO PF SB SF Description Blower Vacuum Switch closed Blower Vacuum Switch open Bad board or secondary high ... Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault Voltage polarity reversed, low voltage detected Keypad failure Temperature Sensor (thermistor) input failure 19 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 LO PF SB SF Description Blower Vacuum Switch closed Blower Vacuum Switch open Bad board or secondary high ... Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault Voltage polarity reversed, low voltage detected Keypad failure Temperature Sensor (thermistor) input failure 19 Diagnostic Codes Below is a list of all Diagnostic Codes for each Code are covered on the following pages.
Universal H Series Troubleshooting Guide
Page 58
... vacuum tubing: IDXL2SNT1930 Ohm out blower for 4-5ohms (after Sept. 2010), is voltage present? 14. YES 2010) OR for 8- 9ohms (before Sept. Service LED ON: "AO" Code "AO" Code Replace blower vacuum switch: FDXLBVS1930 Is blower YES damaged? NO YES Are blower vacuum switch wires damaged? NO Correct voltage YES selector plug?
... vacuum tubing: IDXL2SNT1930 Ohm out blower for 4-5ohms (after Sept. 2010), is voltage present? 14. YES 2010) OR for 8- 9ohms (before Sept. Service LED ON: "AO" Code "AO" Code Replace blower vacuum switch: FDXLBVS1930 Is blower YES damaged? NO YES Are blower vacuum switch wires damaged? NO Correct voltage YES selector plug?
Universal H Series Troubleshooting Guide
Page 59
IF NOT, replace vacuum tubing (pg. 20). Verify voltage selector plug Step 14C IF voltage selector plug matches voltage, go to 14C. Service LED ON: "AO" Code Blower & vacuum switch wiring Step 14A Step 14B Vacuum tube Check for damaged vacuum tubing as well as its connection to step 14D. IF damaged, replace compromised part (pg. 20). IF OK, go to the blower. IF not, power down, replace FC1 & FC2 fuses (if open), & switch plug to step 14B. IF OK, go to proper voltage. 59 Check for bad blower and/or damaged blower vacuum switch wiring. 14.
IF NOT, replace vacuum tubing (pg. 20). Verify voltage selector plug Step 14C IF voltage selector plug matches voltage, go to 14C. Service LED ON: "AO" Code Blower & vacuum switch wiring Step 14A Step 14B Vacuum tube Check for damaged vacuum tubing as well as its connection to step 14D. IF damaged, replace compromised part (pg. 20). IF OK, go to the blower. IF not, power down, replace FC1 & FC2 fuses (if open), & switch plug to step 14B. IF OK, go to proper voltage. 59 Check for bad blower and/or damaged blower vacuum switch wiring. 14.
Universal H Series Troubleshooting Guide
Page 60
... (while calling for 4-5 ohms across the two terminal with wires. Blower plug on ICB. IF OK, replace blower vacuum switch (pg. 20). Service LED ON: "AO" Code (cont.) Step 14D Measure blower resistance Before Sept. 2010 With power off, disconnect blower plug from ICB. Models manufactured before Sept. 2010: measure across 60...
... (while calling for 4-5 ohms across the two terminal with wires. Blower plug on ICB. IF OK, replace blower vacuum switch (pg. 20). Service LED ON: "AO" Code (cont.) Step 14D Measure blower resistance Before Sept. 2010 With power off, disconnect blower plug from ICB. Models manufactured before Sept. 2010: measure across 60...
uhs_qrg_20f0
Page 2
...AO - Blower vacuum switch open LO - Bad board or secondary high voltage fault CE - Maximum return water temp exceeded and/or rapid water temp rise IF - Voltage polarity reversed, low voltage detected Sb - To take a closer look or see other Hayward...Limit is Pre-set To Energy-saving 90 F, See Owner's Manual. use arrowSEsRVICE STANDBY to : www.hayward.com or call 1-800-432-8387 QRG-UHSe TEMP SET TEMP SET TEMP SET Bad board HF -...heater in Spa or Pool Mode for Spa; Programming Diagnostic Codes: AC - Igniter circuit open (check voltage selector plug on new install) bd -
...AO - Blower vacuum switch open LO - Bad board or secondary high voltage fault CE - Maximum return water temp exceeded and/or rapid water temp rise IF - Voltage polarity reversed, low voltage detected Sb - To take a closer look or see other Hayward...Limit is Pre-set To Energy-saving 90 F, See Owner's Manual. use arrowSEsRVICE STANDBY to : www.hayward.com or call 1-800-432-8387 QRG-UHSe TEMP SET TEMP SET TEMP SET Bad board HF -...heater in Spa or Pool Mode for Spa; Programming Diagnostic Codes: AC - Igniter circuit open (check voltage selector plug on new install) bd -