Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 238

ALARM ALARM NAME
CODE IN PANEL
2001 —
2002 —
2003 —
2004
DIR LOCK
2005
I/O COMM
2006
AI1 LOSS
2007 AI2 LOSS
2008 PANEL LOSS
2009 —
2010 MOT OVERTEMP
2011 UNDERLOAD
2012 MOTOR STALL
2013*
AUTORESET
2014* AUTOCHANGE
2015 PFA INTERLOCK
2016 —
2017*
OFF BUTTON
2018* PID SLEEP
2019 ID RUN
2020 OVERRIDE
START ENABLE 1
2021
MISSING
START ENABLE 2
2022
MISSING
2023 EMERGENCY STOP
*This alarm is not indicated by a relay output, even when the relay output is configured to indicate alarm conditions [parameter 1401 (RELAY OUTPUT)
= 5 (ALARM) or 16 (FLT/ALARM)].
VFD Maintenance
If installed in an appropriate environment, the VFD requires
very little maintenance. Table I lists the routine maintenance
intervals recommended by Carrier.
HEAT SINK
The heat sink fins accumulate dust from the cooling air. Since a
dusty sink is less efficient at cooling the drive, overtemperature
faults become more likely. In a normal environment, check the
heat sink annually; in a dusty environment, check more often.
Check the heat sink as follows (when necessary):
1. Remove power from drive.
2. Remove the cooling fan.
3. Blow clean compressed air (not humid) from bottom to top
and simultaneously use a vacuum cleaner at the air outlet to
trap the dust. If there is a risk of the dust entering adjoining
equipment, perform the cleaning in another room.
4. Replace the cooling fan.
5. Restore power.
MAIN FAN REPLACEMENT
The main cooling fan of the VFD has a life span of about
60,000 operating hours at maximum rated operating tempera-
ture and drive load. The expected life span doubles for each
18°F drop in the fan temperature (fan temperature is a function
of ambient temperatures and drive loads).
APPENDIX D — VFD INFORMATION (CONT)
Table H — Alarm Codes
DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION
Reserved
Reserved
Reserved
The change in direction being attempted is not allowed. Do not attempt to change the direction of motor rotation, or Change parameter
1003 DIRECTION to allow direction change (if reverse operation is safe).
Field bus communication has timed out. Check fault setup (3018 COMM FAULT FUNC and 3019 COMM FAULT TIME). Check
communication settings (Group 51 or 53 as appropriate). Check for poor connections and/or noise on line.
Analog input 1 is lost, or value is less than the minimum setting. Check input source and connections. Check the parameter that sets
the minimum (3021) and the parameter that sets the Alarm/Fault operation (3001).
Analog input 2 is lost, or value is less than the minimum setting. Check input source and connections. Check parameter that sets the
minimum (3022) and the parameter that sets the Alarm/Fault operation (3001).
Panel communication is lost and either the VFD is in local control mode (the control panel displays HAND), or the VFD is in remote
control mode (AUTO) and is parameterized to accept start/stop, direction or reference from the control panel. To correct, check the
communication lines and connections, Parameter 3002 PANEL LOSS, and parameters in groups 10 COMMAND INPUTS and 11
REFERENCE SELECT (if drive operation is REM).
Reserved
Motor is hot, based on either the VFD estimate or on temperature feedback. This alarm warns that a Motor Overload fault trip may be
near. Check for overloaded motor. Adjust the parameters used for the estimate (3005 through 3009). Check the temperature sensors
and Group 35 parameters.
Motor load is lower than expected. This alarm warns that a Motor Underload fault trip may be near. Check that the motor and drive
ratings match (motor is NOT undersized for the drive). Check the settings on parameters 3013 to 3015.
Motor is operating in the stall region. This alarm warns that a Motor Stall fault trip may be near.
This alarm warns that the drive is about to perform an automatic fault reset, which may start the motor. To control automatic reset, use
parameter group 31 (AUTOMATIC RESET).
This alarm warns that the PFA autochange function is active. To control PFA, use parameter group 81 (PFA) and the Pump Alternation
macro.
This alarm warns that the PFA interlocks are active, which means that the drive cannot start any motor (when Autochange is used), or
a speed regulated motor (when Autochange is not used).
Reserved
This alarm indicates that the OFF button has been pressed.
This alarm warns that the PID sleep function is active, which means that the motor could accelerate when the PID sleep function ends.
To control PID sleep, use parameters4022 through 4026 or 4122 through 4126.
The VFD is performing an ID run.
Override mode is activated.
This alarm warns that the Start Enable 1 signal is missing. To control Start Enable 1 function, use parameter 1608. To correct, check
the digital input configuration and the communication settings.
This alarm warns that the Start Enable 2 signal is missing. To control Start Enable 2 function, use parameter 1609. To correct, check
the digital input configuration and the communication settings.
Emergency stop is activated.
Fan failure can be predicted by the increasing noise from fan bear-
ings and the gradual rise in the heat sink temperature in spite of
heat sink cleaning. If the drive is operated in a critical part of a
process, fan replacement is recommended once these symptoms
start appearing. Replacement fans are available from Carrier.
To replace the main fan for frame sizes R1 through R4, perform
the following (see Fig. D):
1. Remove power from drive.
2. Remove drive cover.
3. For frame sizes R1 and R2, press together the retaining clips
on the fan cover and lift. For frame sizes R3 and R4, press in
on the lever located on the left side of the fan mount, and
rotate the fan up and out.
4. Disconnect the fan cable.
5. Install the new fan by reversing Steps 2 to 4.
6. Restore power.
To replace the main fan for frame sizes R5 and R6, perform the
following (see Fig. E):
1. Remove power from drive.
2. Remove the screws attaching the fan.
3. Disconnect the fan cable.
4. Install the fan in reverse order.
5. Restore power.
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