Lenze AC Tech MCH Series Quick Reference Manual

MCH FAULT MESSAGES

FAULT DESCRIPTION
OUTPUT
Output transistor fault: Output current exceeded
200%. May be ground fault or short circuit.
LO VOLTS
Low DC Bus Voltage fault: DC bus voltage dropped
below 60%. May be low line voltage.
HI VOLTS
High DC Bus Voltage fault: DC bus voltage
exceeded 120%. May be overhauling load.
HI TEMP
High Temperature fault: Heatsink or ambient
temperature too high.
OVERLOAD
Current Overload fault: Output current exceeded
100% for too long. VFD may be undersized.
PWR TRAN
Power Transient fault.
PWR SAG Power Sag fault: New control board installed.
Perform factory reset using Parameter 65.
LANGUAGE Language EEPROM fault.
EXTERNAL
External fault: TB-13D activated (Parameter 50).
DB ERROR Dynamic Brake fault: DB Resistors overloaded.
CONTROL
Control Board fault: Was new software installed?
Perform factory reset using Parameter 65.
INTERNAL
Internal fault.
INTERN (#) Internal fault.
FLWR / SER
Loss of Follower/Serial fault: 4-20 mA signal at
TB-5B dropped below 2 mA (Parameter 55), or the
serial link was lost (Parameter 56).

MCH FAULT HISTORY

Parameter 99 - FAULT HISTORY stores the last eight faults that tripped
the drive. The FAULT HISTORY indicates the number of the fault
(number 1 is the most recent fault), the fault message, and the status of
the drive at the time of the fault. An example is shown below:
99 FAULT HISTORY
2 OVERLOAD ACCEL
FAULT FAULT DRIVE
NUMBER MESSAGE STATUS
In the example above, the second fault is being viewed, which is an
OVERLOAD fault that ocurred while the drive was accelerating.

MCH PARAMETERS

PARAMETER
NO.
NAME
0 LINE VOLTS
1 PRESET #1
2 PRESET #2
3 PRESET #3
4 PRESET #4
5 SKIP FREQ #1
6 SKIP FREQ #2
7 BANDWIDTH
8 ACCEL RATE
9 DECEL RATE
10 MINIMUM FREQ
11 MAXIMUM FREQ
12 DC BRAKE VOLT
13 DC BRAKE TIME
14 DYNAMIC BRAKE
16 CURRENT LIMIT
17 MOTOR OVRLOAD
18 BASE FREQ
19 FIXED BOOST
22 TORQUE
23 CARRIER FREQ
24 AUTO SOURCE
25 START METHOD
26 STOP METHOD
28 SPEED SRC KEY
29 HAND SOURCE
30 CONTROL
31 UNITS
32 HZ MULTIPLIER
33 UNITS DECIMAL
34 LOAD MULTIPLY
35 LCD CONTRAST
36 SLEEP THRSHLD
37 SLEEP DELAY
39 TB5 MIN FREQ
NOTE 1: REFER TO THE MCH MANUAL.
NOTE 2: THESE PARAMETERS ARE VIEW-ONLY.
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com
FACTORY PARAMETER FACTORY
NO.
DEFAULT NAME DEFAULT
AUTO 40 TB5 MAX FREQ 60.00 HZ
20.00 HZ 41 AN INPUT FLTR 0.02 SEC
20.00 HZ 42 TB10A OUTPUT NONE
20.00 HZ 43 TB10A SCALING 60.00 HZ
20.00 HZ 44 TB10B OUTPUT NONE
.00 HZ 45 TB10B SCALING 125 %
.00 HZ 47 TB13A INPUT NONE
1.00 HZ 48 TB13B INPUT NONE
30.0 SEC 49 TB13C INPUT NONE
30.0 SEC 50 TB13D INPUT EXT FAULT
.50 HZ 52 TB14/RELAY #2 NONE
60.00 HZ 53 TB15/RELAY #3 NONE
.0 VDC 54 RELAY #1 NONE
.0 SEC 55 TB5B LOSS FAULT
OFF 56 SERIAL LOSS FAULT
120 % 57 SERIAL DISABLE
100 % 58 SERIAL ADDRES 30
60.00 HZ 61 PASSWORD 0019
(NOTE 1) 63 SOFTWARE VERS (NOTE 2)
CONSTANT 64 MONITOR MODE ON
2.5 KHZ 65 PROGRAM RESET 60
4-20 MA 66 CLEAR HISTORY MAINTAIN
NORMAL 70 PID MODE OFF
COAST 74 PID FEEDBACK TB-5B
ENABLED 75 FEEDBACK @ MIN 0.00 %
KEYPAD 76 FEEDBACK @ MAX 100.0 %
NORMAL 77 PROPOR. GAIN 5.00 %
spd HERTZ 78 INTEGRAL GAIN 0.0 SEC
1.00 79 DIFF. GAIN 0.0 SEC
XXXXX 80 PID ACCEL 30.0 SEC
100 % 81 MIN ALARM 0.00 %
MED 82 MAX ALARM 0.00 %
.00 HZ 98 LANGUAGE ENGLISH
99 FAULT HISTORY (NOTE 2)
30.0 SEC
.00 HZ
QRMH-OBOC
MCH Series
Quick Reference Guide
NOTE: Before installing and operating the MCH drive, please
read and become familiar with the MCH Series Installation and
Operation Manual.