B8J200880_E - Fault finding
Fault The controller LEDs do not flash for 0.5 seconds when system switched on
Cause The electrical supply has failed.
Cause The pump rotor is spinning.
Fault The pump does not rotate after a parallel start command is supplied
Cause Check that the electricity supply is on and whether the fail output is active.
Fault The pump does not rotate after a serial start command is sent
Cause Check whether the pump returns a reply to the start command.
11. Fault finding
Table 25 Fault finding
The controller LEDs do not flash for 0.5 seconds when system switched on on page 110
The pump does not rotate after a parallel start command is supplied on page 110
The pump does not rotate after a serial start command is sent on page 110
The pump does not respond in multi- drop mode on page 111
The green Normal LED does not light or the pump is not rotating at full speed or the pump fails whilst
running on page 111
Ultimate pressure cannot be reached on page 111
The pump is very noisy or there is excessive vibration or both on page 112
No serial comms on page 112
Fail signal or standby signal not working on page 112
Yellow service LED is flashing a repeated sequence on page 113
The red alarm LED is on on page 113
The red alarm LED is flashing on page 113
Blue bearing LED is flashing a repeated sequence on page 113
Blue bearing LED is lit on page 113
Pump is not accelerating to full speed on page 113
Any other problems on page 113
Remedy Ensure that the electrical supply is switched on and the fuses (and current limiting
devices) have not been tripped.
Remedy The LEDs may not flash if the pump is rotating.
Remedy If there is a fail signal, check whether the red alarm LED is flashing. If it is, refer to
Flashing error codes on page 114. If power is supplied, there is no fail signal and the
rotor still does not rotate then there is a fault with the pump.
Remedy If there is no reply then perform the checks given under No serial comms on page
112 otherwise perform the checks under The pump does not rotate after a serial
start command is sent on page 110.
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