32
Table 12 — Fault Codes
DRIVE PROGRAMMING
To enter password and change program values:
1. Press
Mode.
2. Upper right decimal point blinks.
3. Display reads “00”. To enter the PROGRAM mode to ac-
cess the parameters, press the
Mode
button. This will ac-
tivate the PASSWORD prompt (if the password has not
been disabled). The display will read “00” and the upper
right-hand decimal point will be blinking. (See Fig. 30.)
4. Use the
and
buttons to scroll to the password
value (the factory default password is “111”) and press
the
Mode
button. Once the correct password value is
entered, the display will read “P01”, which indicates that
the PROGRAM mode has been accessed at the beginning
of the parameter menu (P01 is the first parameter).
NOTE: If the display flashes “Er”, the password was incorrect,
and the process to enter the password must be repeated.
5. Press
Mode
to display present parameter number.
Upper right decimal point blinks.
Use the
and
buttons to scroll to the desired
parameter number.
Once the desired parameter number is found, press the
Mode
button to display the present parameter setting. The up-
per right-hand decimal point will begin blinking, indicating
that the present parameter setting is being displayed, and that it
can be changed by using the up and down buttons. Use
and
to change setting. Press
Mode
to store new setting.
Pressing the
Mode
will store the new setting and also exit
the PROGRAM mode. To change another parameter, press the
Mode
key again to re-enter the PROGRAM mode (the param-
eter menu will be accessed at the parameter that was last
viewed or changed before exiting). If the
Mode
key is pressed
within two minutes of exiting the PROGRAM mode, the pass-
word is not required to access the parameters. After two min-
utes, the password must be entered in order to access the pa-
rameters again.
To change password: first enter the current password then
change parameter P44 to the desired password.
To disable automatic control mode and enter manual speed
control mode:
1. Change P05 to ‘01- keypad’.
2. Push UP and DOWN arrow key to set manual speed.
3. Set P05 to ‘04 - 4-20mA control’ to restore 4 to 20 mA
control.
Fault Codes — The drive is programmed to automatically re-
start after a fault and will attempt to restart three times after a
fault (the drive will not restart after CF, cF, GF, F1, F2-F9, or
Fo faults). If all three restart attempts are unsuccessful, the
drive will trip into FAULT LOCKOUT (LC), which requires a
manual reset.
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 13 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.
CAUTION
It is strongly recommended that the user NOT change any
programming without consulting Carrier service personnel.
Unit damage may occur from improper programming.
LEGEND
EPM
—
Electronic Programming Module
