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*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).
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.
APPENDIX D
—
VFD INFORMATION (CONT)
Table H — Alarm Codes
ALARM
CODE
ALARM NAME
IN PANEL
DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION
2001
—
Reserved
2002
—
Reserved
2003
—
Reserved
2004
DIR LOCK
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).
2005
I/O COMM
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.
2006
AI1 LOSS
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).
2007
AI2 LOSS
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).
2008
PANEL LOSS
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).
2009
—
Reserved
2010
MOT OVERTEMP
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.
2011
UNDERLOAD
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.
2012
MOTOR STALL
Motor is operating in the stall region. This alarm warns that a Motor Stall fault trip may be near.
2013*
AUTORESET
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).
2014*
AUTOCHANGE
This alarm warns that the PFA autochange function is active. To control PFA, use parameter group 81 (PFA) and the Pump Alternation
macro.
2015
PFA INTERLOCK
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).
2016
—
Reserved
2017*
OFF BUTTON
This alarm indicates that the OFF button has been pressed.
2018*
PID SLEEP
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.
2019
ID RUN
The VFD is performing an ID run.
2020
OVERRIDE
Override mode is activated.
2021
START ENABLE 1
MISSING
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.
2022
START ENABLE 2
MISSING
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.
2023
EMERGENCY STOP Emergency stop is activated.
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...