Grundfos MP 1 / Redi-Flo2 - Pump Dismantling Procedure; Component Inspection; Pump Reassembly Procedure; Troubleshooting Fault Codes

15
11. Trouble shooting
11.1 Fault code messages
Fault Code No. Description Suggested remedy
no-Flt
00 No fault Not required
OI-b
01 Brake channel over current Check external brake resistor condition and connection wiring
OL-br
02 Brake resistor overload The drive has tripped to prevent damage to the brake resistor
O-I 03 Output Over Current Instantaneous Over current on the drive output. Excess load or shock load on
the motor.
I
_
t-trP
04 Motor Thermal Overload (I2t) The drive has tripped after delivering >100% of value in P-08* for a period of time
to prevent damage to the motor.
PS-trP
05 Power stage trip Check for short circuits on the motor and connection cable
O-volt
06 Over voltage on DC bus Check the supply voltage is within the allowed tolerance for the drive. If the fault
occurs on deceleration or stopping, increase the deceleration time in P-04* or
install a suitable brake resistor and activate the dynamic braking function with
P-34*
U-volt 07 Under voltage on DC bus The incoming supply voltage is too low. This trip occurs routinely when power is
removed from the drive. If it occurs during running, check the incoming power
supply voltage and all components in the power feed line to the drive.
O-t
08 Heatsink over temperature The drive is too hot. Check the ambient temperature around the drive is within the
drivespecication.Ensuresufcientcoolingairisfreetocirculatearoundthedrive.
Increasethepanelventilationifrequired.Ensuresufcientcoolingaircanenterthe
drive, and that the bottom entry and top exit vents are not blocked or obstructed.
U-t
09 Under temperature Trip occurs when ambient temperature is less than -10°C. Temperature must be
raised over -10°C in order to start the drive.
P-dEF 10 Factory Default parameters
loaded
E-tr iP
11 External trip E-trip requested on digital input 3. Normally closed contact has opened for some
reason. If motor thermistor is connected check if the motor is too hot.
SC-ObS
12 Optibus comms loss Check communication link between drive and external devices. Make sure each
drive in the network has its unique address.
FLt-dc
13 DC bus ripple too high Check incoming supply phases are all present and balanced
P-LOSS
14 Input phase loss trip Check incoming power supply phases are present and balanced
h O-I 15 Output Over Current Check for short circuits on the motor and connection cable
th-Flt
16 Faulty thermistor on heatsink Check the analog input connection(s)
dAtA-F
17 Internal memory fault. (IO) Press the stop key. If the fault persists, consult you supplier
4-20F
18 4-20mA Signal Lost Check the analog input connection(s)
dAtA-E
19 Internal memory fault. (DSP) Press the stop key. If the fault persists, consult you supplier
F-Ptc
21 Motor PTC thermistor trip Connected motor thermistor over temperature, check wiring connections and
motor
FAn-F
22 Cooling Fan Fault (IP66 only) Check / replace the cooling fan
O-hEAt
23 Drive internal temperature too
high
Drive ambient temperature too high, check adequate cooling air is provided
AtF-01
40 Autotune Fault The motor parameters measured through the autotune are not correct
Check the motor cable and connections for continuity
Check all three phases of the motor are present and balanced
AtF-02
41
AtF-03
42
AtF-04
43
AtF-05
44