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TOPSIDE PANEL DISPLAY MESSAGES
OHH/HTR TEMP LMT/OH/HL (solid or flashing)
Overheat – Spa has shut down. One of the sensors has de-
tected 48°C (119°F) at the heater.
DO NOT ENTER WATER!
Remove cover and allow water to
cool. Reset system by pressing any topside control panel pad.
If system does not reset, shut off power and call your dealer.
POSSIBLE CAUSES OF OVERHEATING
• filter cycle too long or overlapping (pump running for
extended periods of time)
• isolation/gate valves partially closed
• extremely hot weather/high ambient temperatures
• defective sensor wire
POSSIBLE CAUSES OF OVERHEATING
• filter cycle too long or overlapping (pump running for
extended periods of time)
• isolation/gate valves partially closed
• extremely hot weather/high ambient temperatures
• defective sensor wire
ICE/FREEZE COND
Potential freeze condition detected. Pumps and blower will
automatically activate when temperature drops to 4°C (39°F)
regardless of operation mode.
Prr
Indicates high-limit or water temperature sensor is non-
functional.
SnA/SENSOR A SERVICE RQD
Spa has shut down – sensor plugged into Sensor ‘A’ port not
working.
SnB/SENSOR B SERVICE RQD
Spa has shut down – sensor plugged into Sensor ‘B’ port
notworking.
SnS/SENSOR SYNC
Sensors are out of balance – If topside display alternates
between temperature and SNS, then occurrence may be tem-
porary and will correct itself. The spa shuts down completely
when the SNS message is flashing on the display.
HFL/HTR FLOW LOW
A substantial difference in temperature between the sensors
has been detected – this could indicate a flow problem.
Check water level in spa and add if necessary, also ensure
the filter is clean. If water level is okay, make sure that pumps
are primed and all gate valves are fully opened.
LF/LOW FLOW
Persistent low flow problem – displays on the fifth occurrence
of an HFL message within a 24 hour period. Heater circuit is
deactivated but other spa functions continue to operate nor-
mally. Check water level in spa and add if necessary, also
ensure the filter is clean. If water level is okay, make sure that
pumps are primed and all gate valves are fully opened. Press
any topside panel pad to reset.
Summary of Contents for Serenity Hot Tubs
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