Fault Finding; The Controller Leds Do Not Flash For 0.5 Seconds When The System Is Switched; The Pump Does Not Start After A Parallel Start Command Is Supplied; The Pump Does Not Start After A Serial Start Command Is Sent - Edwards nRVi Instruction Manual

8. Fault finding

Fault The controller LEDs do not flash for 0.5 seconds when the system is switched on
Cause The electrical supply has failed.
Remedy Make sure that the electrical supply is set to on and the fuses (and current limiting
devices) are not tripped.
Fault

The pump does not start after a parallel start command is supplied

Cause Check that the electricity supply is on. Check if the fail output is active.
Remedy If there is a fail signal, check if the red alarm LED is flashing. If yes, refer to
Flashing error codes on page
the rotor does not rotate, the fault is in the pump.
Fault

The pump does not start after a serial start command is sent

Cause Check whether the pump returns a reply to the start command.
Remedy If there is no reply then perform the checks given under
otherwise perform the checks under
sent on page
Fault

The pump does not start after a manual start is sent

Cause Check that the electricity supply is on and whether the fail output is active.
Remedy If there is a fail signal, check whether the red alarm LED is flashing. If it is, refer to
Table: Flashing error codes on page
the pump still does not start then there is a fault with the pump.
Fault

The pump does not start after power is applied in auto run mode

Cause Check that the electricity supply is on, that auto run mode is enabled and whether
the fail output is active.
Remedy If there is a fail signal, check whether the red alarm LED is flashing. If it is, refer to
Table: Flashing error codes on page
auto run LED in on and the pump still does not start then there is a fault with the
pump.
Fault

The pump does not respond in multi-drop mode

Cause The multi-drop is disabled.
Remedy Make sure the pump has a multi-drop address and that commands are sent using the
multi-drop protocol.
Fault

No serial comms

Cause No electrical supply, loss of serial link or serial enable.
A65901880_D - Fault finding
77. If the power is supplied and fail signal is not given, but
72.
Page 72
No serial comms on page 72
The pump does not start after a manual start is
77. If power is supplied, there is no fail signal and
77. If power is supplied, there is no fail signal, the
Table: