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Table 22 — Fault Codes
FAULT CODE DESCRIPTION SOLUTION
AF High Temperature Fault: Ambient temperature is too high; Cooling
fan has failed (if equipped).
Check cooling fan operation
CF Control Fault: A blank EPM, or an EPM with corrupted data has
been installed.
Perform a factory reset using Parameter 48 —
PROGRAM SELECTION.
cF Incompatibility Fault: An EPM with an incompatible parameter ver-
sion has been installed.
Either remove the EPM or perform a factory reset
(Parameter 48) to change the parameter version of
the EPM to match the parameter version of the drive.
CL CURRENT LIMIT: The output current has exceeded the CURRENT
LIMIT setting (Parameter 25) and the drive is reducing the output
frequency to reduce the output current. If the drive remains in CUR-
RENT LIMIT too long, it can trip into a CURRENT OVERLOAD fault
(PF).
Check for loose electrical connections.
Check for faulty condenser fan motor.
Check Parameter P25 from Table 23 is set correctly.
GF Data Fault: User data and OEM defaults in the EPM are corrupted. Restore factory defaults P48, see section above. If
that does not work, replace EPM.
HF High DC Bus Voltage Fault: Line voltage is too high; Deceleration
rate is too fast; Overhauling load.
Check line voltage — set P01 appropriately
JF Serial Fault: The watchdog timer has timed out, indicating that the
serial link has been lost.
Check serial connection (computer)
Check settings for PXX.
Check settings in communication software to match
PXX.
LF Low DC Bus Voltage Fault: Line voltage is too low. Check line voltage — set P01 appropriately
OF Output Transistor Fault: Phase to phase or phase to ground short
circuit on the output; Failed output transistor; Boost settings are too
high; Acceleration rate is too fast.
Reduce boost or increase acceleration values. If
unsuccessful, replace drive.
Check for incorrect wiring T1, T2, T3.
PF Current Overload Fault: VFD is undersized for the application;
Mechanical problem with the driven equipment.
Check line voltage — set P01 appropriately
Check for dirty coils
Check for motor bearing failure
SF Single-phase Fault: Single-phase input power has been applied to a
three-phase drive.
Check input power phasing
F1 EPM Fault: The EPM is missing or damaged.
F2-F9, Fo Internal Faults: The control board has sensed a problem Consult factory
Drive display = 60.0 even though it is
cold outside and it should be running
slower
Feedback signal is above set point Check for proper set point
Check liquid line pressure
Drive display = ‘---’ even though drive
should be running
Start jumper is missing Replace start jumper. See section above
Drive display = 8.0 even though fan
should be running faster
Feedback signal is below set point and fan is at minimum speed Check for proper set point
Check liquid line pressure
VFD flashes 57 and LCS Feedback or speed signal lost. Drive will operate at 57 Hz until reset
or loss of start command. Resetting requires cycling start command
(or power).
In stand alone mode: Check transducer wiring and
feedback voltage. Feedback voltage displayed on
P-69. Pin 6 should be 5 v output. Pin 5 (feedback)
should be somewhere between 0 and 5 v.
L1
L2
L3
Mode
DANGER
T1
T2
T3
B+
B-
DISPLAY
BUTTONS
Mode
MMV
TERMINAL
BLOCK
Fig. 63 — Motormaster
®
V Mode Buttons and Mode Display
LEGEND
MMV — Motormaster V Control