Hayward Universal H-Series Owners Manual: H150FDN H200FDN H250FDN H300FDN H350 - Page 11

11 TEMPERATURE ADJUSTMENT This pool heater is equipped with a digital thermostat which allows the user to select the desired water temperature. The heater will then function automatically to maintain the desired temperature. The heater has 3 modes of operation: 1. STANDBY: in this mode, the heater will not function to heat the water. 2. SPA: in this mode, the heater will automatically function to maintain the water temperature setting for SPA mode. 3. POOL: in this mode, the heater will automatically function to maintain the water temperature setting for POOL mode. Use the MODE button to change modes. The indicator lights will illuminate to show which mode the heater is currently in. Each mode has its own temperature setting, allowing the user to have 2 individual pre-set temperature settings. To adjust the temperature while in SPA or POOL mode, use the UP and DOWN buttons. The numeric display will flash to indicate the temperature setting is being displayed / adjusted. When the numeric display is not flashing, the actual water temperature is being displayed. The temperature settings for both SPA and POOL modes are initially set at the factory to 65°F. The minimum allowed settings for SPA and POOL modes are both 65°F. The maximum allowed settings for SPA and POOL modes are adjustable up to 104°F using the temperature lockout feature (see next section). After selecting SPA or POOL mode or adjusting the temperature setting, it is normal for the heater to delay up to 10 seconds before the heater starts operating. This delay is an internal self-test of the heater. On occasion, the numeric display may show a diagnostic error code; refer to list of diagnostic error codes in Figure 4. Pressing the MODE button to cycle to STANDBY and back to SPA or POOL will clear a diagnostic error code. When clearing a diagnostic error code this way, it is normal for the heater to delay up to 5 seconds before resuming normal operation, assuming the diagnostic error code does not re-appear. diagnostic error code this way, it is normal for the heater to delay up to 5 seconds before resuming normal operation, assuming the diagnostic error code does not re-appear. Figure 3: UFseigruinrete3rf:aUcesekreyinptaedrface keypad Numeric Display Indicator Lights Buttons TEMPERATURE LOCK-OUT The digital thermostat in this pool heater allows the user to lock the maximum temperature setting allowed. This feature is useful for preventing unauthorized users from manually adjusting the temperature settings higher than desired. On a new heater, the maximum allowed temperature lock settings are initiallyUsSeEt aOt tNhLeYfaHctoArYyWtoA9R0D°F GfoEr NPOUOINLEmRodEeP, aLnAdC1E0M4°EFNfoTr PARTS SPA21..moPUdrseee.sstThoaenaMddOjhuDosltEdthbbeoustthetotsnheettotiUnpPgusta,tnhudeseDhetOhaeWtefNrolilnbouwSttiTnoAgnTNsepDlar:otB9Pct0Yohe8edmm-u3soor5aendm1:ae-,e5. C4tiA0m0Ce.lemwmwown.sh, aNyCwNaradsphovoilll.ec,oTmN 3. After 3 seconds, the thermostat enters maximum temperature lock adjustment mode. 4. The SPA indicator light illuminates and the numeric display shows the current SPA mode