TTI Elite 55 - Error Codes and Causes; Code dpo: Water Temperature Sensor; Code dpc: Evaporator Temperature Sensor; Codes LP & LP3: Low Pressure Detector

13
CODES
CODE
DESCRIPTION
POSSIBLE CAUSES
ACTION
dpo
Water temperature sensor
Heat pump shuts off
Water temperature sensor is not
working or has been improperly
connected
Call a certified technician
dpc
Evaporator temperature sensor
Heat pump shuts off
Evaporator temperature sensor is
not working or has been
improperly connected
Call a certified technician
LP &
LP3
System low pressure detector
Heat pump resumes operation
when temperature returns to
normal
Heat pump and filter pump shut
off if FIL is between 2 and ON
Loss of cooling fluid (leak)
Low pressure sensor is not
working or has been improperly
connected
LP3 will be displayed after
having displayed LP on 3
occasions, and heat pump will be
shut off
Call a certified technician
HP &
HP3
System high pressure detector
Heat pump resumes operation
when temperature returns to
normal
Heat pump and filter pump shut
off if FIL is between 2 and ON
Water flow has been interrupted
or has slowed
Valves are closed and bypass is
open
High pressure sensor is not
working or has been improperly
connected
HP3 will be displayed after
having displayed HP on 3
occasions, and heat pump will be
shut off
Correct water flow issue and
perform regular backwashes
Open valves and close bypass
Call a certified technician
OFF
Desired temperature is below
60°/ 15°C
Change desired temperature
Flo &
FL3
No water flowing to the heat
pump
Heat pump resumes operation
when water flow is detected
Heat pump and filter pump shut
off if FIL is between 2 and ON
Pool pump has shut off
Valves are closed or flow
detector is not working or has
been improperly connected
Filter is dirty or pool water level
is too low
FIL function should be set to
OFF
FL3 will be displayed after
having displayed Flo on 3
occasions, and heat pump will be
shut off
FS
Heat pump is in the midst of its
defrosting cycle
This is part of normal operation.
Compressor is off, fan is on to
eliminate frost
po
Water temperature sensor
Is open
Heat pump shuts off
Water temperature sensor is not
working or has been improperly
connected
Call a certified technician
pc
Water temperature sensor
Is short circuit
Water temperature sensor has
been improperly connected
Call a certified technician