Specifications

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903 Catalog No. 530-930 Printed in U.S.A. Form 09/30/38-6SI Pg 28 506 10-03 Replaces: 09/30/38-
5SI
Book122
Tab 3a4a5c
Copyright 2003 Carrier Corporation
Table 11 — Fault Codes
LEGEND
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. See Drive Programming section, page 25.
cF
Incompatibility Fault: An EPM with an incompatible
parameter version 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.
GF
Data Fault: User data and Carrier defaults in the EPM are
corrupted.
Restore factory defaults by toggling P48 to another mode.
Then set P48 to desired mode to restore all defaults for that
mode. See Drive Programming section, page 25. 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 P15.
Check settings in communication software to match P15.
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 transis-
tor; Boost settings are too high; Acceleration rate is too
fast.
Reduce boost or increase acceleration values. If unsuccess-
ful, replace drive.
PF
Current Overload Fault: VFD is undersized for the appli-
cation; 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. Install EPM or replace with new EPM.
F2 - F9, Fo Internal Faults: The control board has sensed a problem. Consult factory.
Drive display = ‘---’
even though drive
should be running
Start contact is missing or not functioning. Check the fan relay for proper operation. See Drive Program-
ming section, page 25.
VFD not slowing
down even though
liquid line pressure
is below setpoint.
Faulty pressure transducer output
VFD set for manual control.
Check VDC signal between TB5 and TB2. Should be in range
of 0.5 V to 4.5 V.
Restore VFD to automatic control. Change Parameter P05
back to correct value shown in Table 8.
VFD flashes “---”
and LCS
No start contact in place. Refer to Table 7 for proper jumper location.
Check fan relay contact.
VFD flashes 57 (or
47) and LCS
Speed signal lost. Drive will operate at 57 (or 47) Hz until
reset or loss of start command. Resetting requires cycling
start command (or power).
Transducer signal lost. Check VDC signal between TB5 and
TB2. Should be in range of 0.5V to 4.5V. 5VDC output should
be present between TB6 and TB2.
EPM — Electronic Programming Module
LCS — Loss of Control Signal
VFD — Variable Frequency Drive