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APPENDIX G
—
OPTIONAL MOTORMASTER
®
V CONTROL (CONT)
Fault Lockout
If a fault lockout (LC) has occurred, view the fault history in P50
to find the last fault. Once P50 is displayed, use the arrow buttons
to scroll through the last 8 faults. Any current faults or fault codes
from the fault history can be analyzed using Table R.
TO DISABLE AUTOMATIC CONTROL MODE AND
ENTER MANUAL SPEED CONTROL:
1. Change P05 to “01- keypad”.
2. Push UP and DOWN arrow button to set manual speed.
3. Set P05 to proper value to restore automatic control
according to Table Q.
TO PROVIDE MANUAL START/STOP CONTROL
With power removed from VFD, remove start command jump
-
er and install a switch between the appropriate start terminals
as required in Table P.
EPM Chip
The drive uses a electronic programming module (EPM) chip
to store the program parameters. This is an EEPROM memory
chip and is accessible from the front of the VFD. It should not
be removed with power applied to the VFD.
Loss of CCN Communications
Carrier Comfort Network
®
(CCN) communications with external
control systems can be affected by high frequency electrical noise
generated by the Motormaster
®
V control. Ensure unit is well
grounded to eliminate ground currents along communication
lines.
If communications are lost only while Motormaster V control
is in operation, order a signal isolator (CEAS420876-2) and
power supplies (CEAS221045-01, 2 required) for the CCN
communication line.
Liquid Line Pressure Set Point Adjustment
Adjusting the set point may be necessary to avoid interaction with
other head pressure control devices. If adjustment is necessary, use
the set point parameter found in P-34 for R-410A. A lower value
will result in a lower liquid line set point. As an example for
R
-
410A, decreasing the P-34 from 24 to 23 will decrease the liq
-
uid line pressure by approximately 15 psig. It is recommended to
adjust R-410A units by 1.
Table R — Fault Codes
LEGEND
NOTE: The drive is programmed to automatically restart after a fault
and will attempt to restart 3 times after a fault (the drive will not restart
after CF, cF, GF, F1, F2-F9, or Fo faults). If all 3 restart attempts are
unsuccessful, the drive will trip into FAULT LOCKOUT (LC), which
requires a manual reset.
CODE
DESCRIPTION
RESET
METHOD
PROBABLE CAUSE
CORRECTIVE ACTION
AF
High Temperature Fault
Automatic Ambient temperature is too high; Cooling
fan has failed (if equipped).
Check cooling fan operation.
CF
Control Fault
Manual 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.
cF
Incompatibility Fault
Manual 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.
F1
EPM Fault
Manual The EPM is missing or damaged.
Install EPM or replace with new EPM.
F2—F9
Fo
Internal Faults
Manual The control board has sensed a
problem.
Consult factory.
GF
Data Fault
Manual 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. If that does not work,
replace EPM.
HF
High DC Bus Voltage Fault
Automatic Line voltage is too high; Deceleration rate
is too fast; Overhauling load.
Check line voltage — set P01 appropriately.
JF
Serial Fault
Automatic
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
Automatic Line voltage is too low.
Check line voltage — set P01 appropriately.
OF
Output Transistor Fault
Automatic
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.
PF
Current Overload Fault
Automatic
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
Automatic Single-phase input power has been
applied to a 3-phase drive.
Check input power phasing.
Drive displays
“---” even though
drive should be
running
Start Contact is Not Closed
Automatic Start contact is missing or not
functioning.
Check fan relay.
VFD flashes
“---”
and LCS
Start Contact is Not Closed
Automatic Start contact not closed.
Check FR for closed contact.
VFD flashes 57 (or 47)
and LCS
Speed Signal Lost
Automatic
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
FR
—
Fan Relay
LCS
—
Loss of Control Signal
TB
—
Terminal Block
VFD
—
Variable Frequency Drive
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 ...