Viconics HP727S User Manual
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9. TROUBLE SHOOTING:
The instrument is capable of detecting a number of malfunctions, which may occur operating conditions.
When a malfunction occurs:
1) The heatpump fan and compressor are turned off.
2) The display flashes an error code for 5 seconds.
3) The instrument goes into power-up and restart sequences.
If the malfunction persists this process is repeated.
Error codes:
dPO
Evaporator temperature sensor connection
opened
Check for cut or loose sensor wiring or defective evaporator sensor.
PO
Water temperature sensor connection opened Check for cut or loose sensor wiring or defective water sensor.
dPC
Evaporator temperature sensor connection
shorted
Check for a short in sensor wiring or defective evaporator sensor.
Pc
Water temperature sensor connection
shorted
Check for a short in sensor wiring or defective water sensor.
LP
Low pressure
Check for refrigerant leaks or defective low pressure switch or wiring.
HP
High pressure
Check for evaporator fan operation or defective high pressure switch or
wiring.
FLo
No water flow at main flow switch
Circulation pump is off, filter is clogged or on backwash.
Defective flow switch or wiring.
FS
Evaporator frosted
Heatpump in defrost cycle mode.
PLE
EEPROM memory data loss
CSE
EEPROM memory data loss
If the PLE or CSE error message appears, hold down the Service /
Select key until the error message disappears ( approx. 4 seconds ). The
control will be re-initiated to factory default.
Re-enter the Pool / Spa setpoints and minimum filtration time
parameter.
SPi
Defective controller
Remove power and re-start. If error is still present, replace the unit.
Error management:
1. An LP error code will stop the circulating pump, other errors will not stop the pump.
2. Error codes will not prevent access to user and service mode.
HP error code:
When HP error code becomes active, the compressor and the fan will stop.
• After 3 consecutive HP detection within an hour, the lockout mode for HP3 will be activated.
• To get out of the HP3 lockout mode, a button must be depressed.
• The unit may re-enter HP3 lockout mode if again there are 3 consecutive HP detection’s within an hour.
LP error code:
When LP error code becomes active, the compressor and the fan will stop.
• After 3 consecutive LP detection within an hour, the lockout mode for LP3 will be activated.
• To get out of the LP3 lockout mode, a button must be depressed.
• The unit may re-enter LP3 lockout mode if again there are 3 consecutive LP detection’s within an hour.
FLo error code:
• If parameter FIL = off, the Flo error message will be displayed whenever the flow switch does not register any water flow.
• If parameter FIL = on, the Flo error message will be displayed whenever the flow switch does not register any water flow.
• If parameter FIL is selected between 2 to 23 hours of operation daily:
• If the main flow switch detects no water flow when the circulating pump is requested to operate:
∗ Pump will stop after a 5 minutes on delay and display the FLo error code.
∗ After a 5 minutes off delay, the system will attempt to restart the circulating pump.
∗ After 3 consecutive retry, if the pump still does not start the circulating pump lockout mode will be activated
( FL3 error code) .