Owner`s manual

www.imperialspaparts.com

“FLO”

Error Messages ( Continued )

The control system checks for water flow through the circulation / filtration and heater plumbing.

During this process the system checks to see if the circulation pump has input current. If an error

is detected, the topside control will display the error code “FLO”- THE CURRENT WATER TEM-

PERATURE- “FLO” And the heater is deactivated. The filter pump may have lost prime and is

overheating and stopped running or the filter pump cord is disconnected. Automatic reset will

occur if the condition is fixed within 5 minutes. A manual reset is required if the problem persist

for longer than 5 minutes. Check for proper water level, make sure the pump is primed, and there

are no leaks or clogged filters. This must be repaired by a service technician if the problem

persists.

“FC” Freeze Condition

The control System checks the water temperature for a reading at or below 60ºF(15ºC) If an error

is detected, the topside control will display the code “FC” this means a potential freeze condition

has been detected (the spa temp is below 60ºF(15ºC). No action is required at this time, the

system will automatically turn on the heater. In the Economy mode (ECO Mode) the heater will

still work & will automatically bring the water temperature up to a safe temperature then shut

down. When the water temperature in the spa is equal to or less than 50ºF(10ºC) the spa will turn

on the high speed pump(s) for 5 minutes, the heater is not active. After the 5 minute period the jet

pump(s) will shut down. Then the system will automatically energize the heater for 20 minutes.

These cycles will be repeated until the spa reaches a safe temperature (above 60ºF(15ºC). The

topside control will display “FC” - current water temperature - “FC”. This must be repaired by

a service technician if the problem persists.

“Ht” High temperature condition.

The control system checks the spa water for temperatures equal to or above 110ºF(43ºC). If the

water temperature is equal to or above 110ºF(43ºC), The topside control will display the code

“Ht” - current water Temp - “Ht”. All the Jets will shut down. The air blower (if equipped) is

automatically energized to assist in lowering the water temperature when equal to or greater than

110ºF. The blower will be deactivated after the spa temperature drops below 107ºF. This issue

can be caused by ambient temperatures in the summer time or excessive high speed jet opera-

tion, for example resetting the high speed Jets continuously after each 20 minute shut down

cycle may eventually cause the “HT” condition. Allow time for the system to reset. This must be

repaired by a service technician if the problem persists.

“OHt” Overheating Condition / Watchdog.

The system checks the spa water for temperatures equal to or above 120ºF(48ºC) or the heater

enclosure temperature that is equal to or above 125ºF(51ºC). If the spa water temperature is

equal to or above 120ºF(48ºC) or the heater enclosure temperature is equal to or above

125ºF(51ºC), the topside control will flash “OHt” - current Water Temp - “OHt” and the entire

system will shut down. The “OHt” condition requires a manual reset either by pushing the

buttons simultaneously, or by turning the main power off and then back on. The heater hi-limit

switch cannot reset until the heater enclosure temperature drops below 123ºF(50ºC) or the water

temperature in the spa drops below 117ºF(47ºC). This must be repaired by a service technician

if the problem persists.

Note: For manual reset, push the buttons simultaneously or turn the main power off