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APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER
®
V CONTROL (cont)
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 exter-
nal 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 communica-
tion 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 Setpoint Adjustment
Adjusting the setpoint may be necessary to avoid interaction
with ther head pressure control devices. If adjustment is neces-
sary, use the setpoint parameter found in P-34 for R-410A. A
lower value will result in a lower liquid line setpoint. As an ex-
ample for R-410A, decreasing the P-34 from 24 to 23 will de-
crease the liquid line pressure by approximately 15 psig. It is
recommended to adjust R-410A units by 1.
Table N — Fault Codes
LEGEND
NOTE: The drive is programmed to automatically restart after a fault
and will attempt to restart three times after a fault (the drive will not
restart after CF, cF, GF, F1, F2-F9, or Fo faults). If all three 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 cor-
rupted data has been installed.
Perform a factory reset using
Parameter 48 – PROGRAM
SELECTION. See Drive Program-
ming 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 tog-
gling 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; Decelera-
tion 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 (com-
puter). 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 acceler-
ation values. If unsuccessful,
replace drive.
PF
Current Overload Fault
Automatic
VFD is undersized for the applica-
tion; 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 three-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 oper-
ate 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 WEATHERMAKER 48A2020
Page 112: ...112 Fig 20 Typical Main Control Box Wiring Schematic 48 50A Units ...
Page 113: ...113 Fig 21 Typical Auxiliary Control Box Wiring Schematic ...
Page 114: ...114 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown ...
Page 115: ...115 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown TO NEXT PAGE ...
Page 116: ...116 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont ...
Page 117: ...117 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown ...
Page 118: ...118 Fig 25 Typical Controls Option Wiring Schematic SW1 SW2 OR DEHUMIDIFY SWITCH ...
Page 119: ...119 Fig 26 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown ...
Page 120: ...120 Fig 27 Typical Power Schematic of Greenspeed Low Ambient Option 48 50A 060 Unit Shown ...
Page 121: ...121 Fig 28 Typical Small Chassis Component Location Size 020 035 Units ...
Page 122: ...122 Fig 29 Typical Large Chassis Component Locations Size 040 060 Units ...
Page 185: ...185 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716 ...