Sterlco GC Series Central Chiller - Manual (Page 50)

GC Series Central Chillers Chapter 6: Troubleshooting 50 of 79
Controller Alarm Possible Cause Solution
Faulty sensor cable Replace cable
Faulty sensor Replace sensor
Low Suction Pressure at Startup Contact ACS Group Aftermarket
Service for assistance
Troubleshooting the ABB Variable Speed Drive
If a current alarm exists, the drive will be flashing a fault code on the LED display. Below is a table of
common faults and their corrections.
NOTE: If a fault code is not listed in the table below contact ACS Group Aftermarket Service at [800]
423-3183.
Code VFD Alarm Possible Cause Solution
F0001 OVERCURRENT Output current has exceeded trip level.
Overcurrent trip limit for drive is
325% of drive nominal current. Check motor load.
Check motor and motor cable
(including phasing).
Check ambient conditions. Load
capacity decreases if installation site
ambient temperature exceeds 40°C.
F0002 DC OVERVOLT Excessive intermediate circuit DC
voltage. DC overvoltage trip limit is
420 V for 200 V drives and 840 V for
400 V drives.
Check that overvoltage controller is on
(parameter 2005 OVERVOLT CTRL).
Check input power line for static or
transient overvoltage.
Call ACS Group Aftermarket Service
F0003 DEV OVERTEMP Drive IGBT temperature is excessive.
Fault trip limit is 135°C. Check ambient conditions.
Check air flow and fan operation.
Check motor power against unit
power.
F0004 SHORT CIRC Short circuit in motor cable(s) or
motor Check motor and motor cable.
F0006 DC UNDERVOLT Intermediate circuit DC voltage is not
sufficient due to missing input power
line phase, blown fuse, rectifier bridge
internal fault or too low input power.
DC undervoltage trip limit is 162 V
for 200 V drives and 308 V for 400
Drives
Check that undervoltage controller is
on (parameter 2006 UNDERVOLT
CTRL).
Check input power supply and fuses.
F0016 EARTH FAULT Drive has detected earth (ground) fault
in motor or motor cable. Check motor.
Check fault function parameter
setting.
Check motor cable. Motor cable
length must not exceed 50’.
F0018 THERM FAIL Drive internal fault. Thermistor used
for drive internal temperature
measurement is open or short-
circuited. Check the cooling fan for failure.
Contact ACS Group Aftermarket
Service
F0022 INPUT PHASELOSS Intermediate circuit DC voltage is
oscillating due to missing input power
Check input power line fuses.