SCC MAM - 890 User manual

Compressor Controller
MAM – 890
OPERATION MANUAL
Revision 1.0
04.08.2017

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Notice
Please read all the operation manual before operating the set and keep this manual for further reference.
Installation of MAM—8** compressor controller can be performed only by professional technicians.
RC snubber must be connected to the two terminals of coil (such as AC contactor, valve, etc),which are
controlled by relay output.
Port connection shall be inspected carefully before power on.
PARAMETER is not allowed to be modified in running and stop delay status. Only user
parameter is allowed to be changed at running status

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Contents
1 Basic Operation ................................................................................................................................................... - 4 -
1.1 Button Explanation .................................................................................................................................. - 4 -
1.2 Indicator Instruction ................................................................................................................................ - 5 -
1.3 Status Display and Operation ................................................................................................................... - 6 -
1.4 Operating Parameter and Menu: ............................................................................................................. - 6 -
1.5 User Parameter View and Modification: ................................................................................................. - 7 -
1.6 User Parameter: ....................................................................................................................................... - 9 -
1.7 Factory Parameter ................................................................................................................................. - 11 -
1.8 Calibration Parameter ............................................................................................................................ - 12 -
1.9 Operating Authorization and Password ................................................................................................. - 12 -
2 Controller Function and Technical Parameter .................................................................................................. - 13 -
3 Model and Specification ................................................................................................................................... - 14 -
4 Overview ........................................................................................................................................................... - 15 -
5 Control Process ................................................................................................................................................. - 16 -
6 Alarm Function ................................................................................................................................................. - 18 -
7 Controller Protection ........................................................................................................................................ - 19 -
7.1 Motor Protection ................................................................................................................................... - 19 -
7.2 Protection of High Discharge Air Temperature ...................................................................................... - 19 -
7.3 Protection of Air Compressor Reversal .................................................................................................. - 19 -
7.4 Protection of High Pressure ................................................................................................................... - 19 -
7.5 Protection of Sensor Failure................................................................................................................... - 19 -
7.6 Low Temperature Protection ................................................................................................................. - 19 -
8 Troubleshooting ................................................................................................................................................ - 20 -
9 Sequence Mode Control and Network ............................................................................................................. - 21 -
9.1 Sequence Mode Control ........................................................................................................................ - 21 -
9.2 Network ................................................................................................................................................. - 21 -
9.3 Sequence Mode Setting ......................................................................................................................... - 22 -
9.2.1 Set as Master ...................................................................................................................................... - 22 -
9.2.2 Set as Slave.......................................................................................................................................... - 23 -
9.4 Start, Stop Sequence Control: ................................................................................................................ - 23 -
9.5 Sequence Communication Receiving and Sending Message: ................................................................ - 23 -
10 Copyright ........................................................................................................................................................ - 24 -

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1 Basic Operation
1.1 Button Explanation
Start Button:
 When compressor is at stop status, press this button to start the compressor
 When compressor is set as master (No.1) in block mode, press this button to start the compressor and
activate block mode function at the same time
Stop Button:
 When the compressor is at running status, press this button to stop the compressor
 When compressor is set as master (No.1) in block mode, press this button to stop compressor and block
mode function as well
 When compressor is at stop status, long press this button to display software edition
Set Button /Loading / unloading Button:
 When the compressor is at running status, press this button to load, unload
 When the compressor is at setting mode, press this button after modification to confirm and save the
modified data

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Move down button / Decreasing button:
 When viewing the menu, press this button to move downward the cursor
 When modifying data, press this button to decrease the data at current position
Move up button/Increasing button:
 When viewing the menu, press this button to move upward the cursor
 When modifying data, press this button to increase the data at current position
Shift button /Enter button:
 When modifying data, press this button to move to the next data bi
 When select menu, press this button to switch to submenu. If no submenu available, the controller will
shift to data setting mode
Return button / Reset button:
 When modifying data, press this button to exist data setting mode
 When viewing the menu, press this button to return to previous-menu
 When the controller is at failure stop status, long press this button to reset
1.2 Indicator Instruction
Power Indicator： Indicator on when controller is energized
Run indicator： Indicator is on when motor is running
Alarm indicator： Indicator is blinking when alarming; indicator on when fail to stop; indicator off when error
is cleared

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1.3 Status Display and Operation
The display screen will show as below after power on:
After 5 seconds, the menu will switch as below:
Press , the main page will show up as:
Press to enter selection menu:
1.4 Operating Parameter and Menu:
Press or to move the cursor to “RUN PARAMETER”, then press to switch to secondary
menu:
Press to check MOTORS CURRENT, TOTAL RUN TIME, TOTAL LOAD TIME, and other running parameter.
Press to return to the previous menu or main menu. If no operation in certain menu for 60s, machine
will return to the main menu automatically.
WELCOME USING
SCREW COMPRESSOR
AIR P： 0.53MPa
NORMAL STOP C01
MOTOR、
FAN CURRENT
TOTAL RUN TIME
RUN PARAMETER
USER PARAMETER
AIR T： 80°C
NORMAL STOP C01
FACTORY PARAMETER
MOD PARAMETER

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1.5 User Parameter View and Modification:
FACTORY PARAMETER is not allowed to be modified in running and stop delay status.
In first menu press or to move the cursor to the “USER PARAMETER”.
Press to switch to the following menu
Move the cursor to the “P, T SET”, then press to switch to secondary menu
User can check the CUSTOMER PARAMETER in this menu or press to switch to the following menu
which requires a user password input
SET P、
SET TIME
LOADING P: 0.8MPa
UNLOADING P: 0.6MPa

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In this menu the first data bit of password blinking, press or to modify the first bit of password.
Press move the cursor to the next data bit, modify the second data bit of password in accordeance with the
above. Modify the the third and fourth data of password in sequence, press to confirm the input data and
the menu will switch to the following menu after verification.
The upper right corner
with “*” indicates the
system verification
of the password
In the menu above press , the first data of LOADING P start to blink, user can press or to modify
the present data in accordance with the above method. Press to move to next data bit and modify the
target data in sequence. When finished press to confirm and save the data. The controller sends out a short
sound to tip the completion of parameter set.
Other CUSTOMER PARAMETER share the similar way for modification.
NOTE: Customer password can be set in CUSTOMER PARAMETER
and is set as 1688.
ENTER PASSWORD
****
BLOCK LOAD P: 0.8MPa *
BLOCK UNLOAD P: 0.6MPa
FAN START T: 80
℃
FAN STOP T: 70
℃

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1.6 User Parameter:
Menu Preset Value
Functions
LOAD PRES 0,65 MPa 1. In AUTO LOADING status, compressor will load if pressure is below this set data
2. In STANDBY mode, compressor will start if the pressure below this set data
UNLOAD PRES 0,80 MPa
1.
Compressor will unload automatically if air
pressure is above this set data
2. This data should be set above LOADING PRES, also should be set below UNLD P
LIM
FAN START TEMP 0080
℃
Fan will start if AIR T is above this set data
FAN STOP TEMP 0070
℃
Fan will stop if AIR T is below this set data
MOTOR DELAY 0010s
Set the
MOTOR
START TIME. Record time
when motor is activated, controller will
not start overload protection during this time to avoid impulse starting current
stopping the motor.
STAR DELAY TIME 0005S Interval time from star start to delta start.
LOAD DELAY TIME 0003S Unloading in this set time after enter delta running
EMPTY DELAY TIME 0600S When unloading continuously, compressor will automatically stop and enter to
standby status if over this set time
STOP DELAY TIME 0030S For NORMAL STOP operation, compressor will stop after it continuously
unloading over this set time
START DELAY TIME 0030S Machine cannot be restarted before this set time (stop and over time load free
stop till this time)
START MODE LOCAL/ REMOTE
LOCAL: Only the button on the controller can turn on and turn off the machine.
REMOTE: both the button on the controller and the remote-control button can
turn on and turn off the machine.
LOAD MODE AUTO/
MANUAL
MANUAL:
O
nly when the pressure is above
Unload P, compr
essor will unload
automatically. For any other case, the Load/Unload function can only be executed
by pressing “load/unload” key.
AUTOMATICAL: The load/unload function can be executed by the fluctuation of
AIR P automatically
COM MODE
PROHIBIT
COMPUTER
SEQUENCE
PROHIBIT
:
C
ommunication function is not
activated.
COMPUTER: Compressor can communicate with computer or DCS as slave
according to MODBUS-RTU.
SEQUENCE: Compressors can work in a net
COM ADD 0001 Communication address
SEQ STATE MASTER/
SLAVE
1. When service as master in SEQUENCE, master controls slave; the COM ADD
should be set as No.1
2. When service as slave in SEQ, slave is controlled by master
TOGGLES TIME 99 Hours When master pressure is between SEQ LOAD P and SEQ UNLD P, master
determines slave to work alternatively after working over this set time
SEQ NUMBER 0016 Number of air compressors in SEQ net
SEQ PRES 1.36MPa In SEQ mode, one compressor will start or load when master AIR P is below this
set data
SEQ U.L. PRES. 1.36MPa
In SEQ mode, one compressor will stop or unload when master AIR P is above this
set
Data

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SEQ DELAY TIME 200S In SEQ mode, when master sends two commands continuously, second command
signal delays for this set data
OIL FILTER RST 0000H Record total running time of OIL filter. If changing new oil filter, the data should
be reset by manual operation.
O/A FILTER RST 0000H Record total running time of O/A separator. If changing new O/A separator, the
data should be reset by manual operation.
AIR FILTER RST 0000H Record total running time of AIR filter. If changing new AIR filter, the data should
be reset by manual operation.
LUBE RESET 0000H Record total running time of LUBE. If changing lubricate, the data should be reset
by manual operation.
GREASE RESET 0000H Record total running time of GREASE. If changing new grease, the data should be
reset by manual operation.
BELT RESET 0000H Record total running time of BELT. If changing new belt, the data should be reset
by manual operation.
OIL FILTER SET 0500H
1. Alarm prompt when total running time of oil filter is above the set data.
2. Set this data to “0000”, alarm function for oil filter running time is not
activated
O/A FILTER SET 3000H
1. Alarm prompt when total running time of O/A separator is above the set data.
2. Set this data to “0000”, alarm function for O/A separator running time is not
activated
AIR FILTER SET 0500H
1. Alarm prompt when total running time of air filter is above the set data.
2. Set this data to “0000”, alarm function for air filter running time is not
activated
LUBE SET 0500H
1. Alarm prompt when total running time of lubricant is above the set data.
2. Set this data to “0000”, alarm function for lubricant running time is not
activated.
GREASE SET 3000H 1. Alarm prompt when total running time of grease is above the set data.
2. Set this data to “0”, alarm function for grease running time is not activated
BELT SET 3000H 1. Alarm prompt when total running time of belt is above the set data.
2. Set this data to “0”, alarm function for grease running time is not activated
Language select English Change the display language.
User password modification ****
User could modify the user password by old
user password or factory password

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1.7 Factory Parameter
The view and modification of factory parameter requires a factory password. The modification step is same
as customer parameter modification. Main function is as below.
Menu Preset Value Function
MOTOR CUR Maximum motor overload data
/1.2
When the current of motor is more than 1.2 times of the set data, the
unit will stop for overload feature. (see table2.1.1)
PRE-ALARM TEMP 105
℃
When discharge air temperature reaches this set data, compressor will
alarm
STOP TEMP 110
℃
When the discharge air temperature reaches this set data, compressor
will alarm and stop
STOP PRESS 0.90MPa When pressure reaches this set data, compressor will alarm and stop
MAX U.L. PRESS 0.80MPa
This data is the maximum of UNLOADING P. The UNLOADING P in the
customer parameter must be set no higher than this data.
TOTAL RUN TIME 000100Hours Modify the TOTAL RUN TIME
TOTAL LOAD TIME 000095Hours Modify the TOTAL LOAD TIME
RESET FAULT ****
Input the password 8888 and press “set “button to clear all the history
failure record.
CURR UNBALANCE 0006
MAX
-
MIN >= SET*MIN/10,
respond time is 5s
If the set data
≥ 15, the
unbalance protection will be invalid.
LACK PAHSE TIME 002.0s
If OPEN PHASE protection
≥20 seconds, OPEN PHASE protection is
invalid
DATE ****-**-** Production date
SERIAL NUMBER ******** Product serial No.
PHASE PRO. ENABLE / DISABLE
ENABL
E
: turn on phase sequence protection
DISABLE: turn off phase sequence protection
FRE. SEL 50HZ/60HZ Set the operation power frequency
SEQ MODE ADVANCED/
COMPATIBLE
Set as compatible mode, block mode is the same as the
other series
When SEQ control with MAM 8*0 controller and set as advanced
mode, more block mode function is available
LOW T PROTECT -0018
℃
1
.
In stop mode, air compressor is not allowed to start when discharge
air temperature is lower than this set data
2. Two minutes after turning on, when the air temperature is below
this data, compressor will stop and display T SENSOR FAULT
MAX RUN TIME 0000H
1
.
When the compressor is in a stop status and the TOTAL RUN TIME
exceeds this TIME LIM set, the controller will stop the compressor and
display USER MISTAKE;
2. If this data is set to ‘0000’, TIME LIMIT function is invalid.
ALARM LONG STOP 0010H
C
ontroller detects oil filter, O/A separator, air filter, lubricate oil,
grease
and belt running with alarming over this ALARM STOP set, compressor
will stop and report ” ALARM LONG STOP”
COM SET PAR ENBALE/
DISABLE
1, When set as ON, User can use DCS to set data through MODBUS
protocol；
2, When set as OFF, User cannot use DCS to set data through MODBUS
protocol
3, User can use DCS to set data only when compressor is at stop status
PARA1 **** User could modify the factory password by old factory password.
START MODE SEL STAR-DELTA/
DIRECT-START DIRECT START or STAR-DELTA

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1.8 Calibration Parameter
You can set relative data of controller in CALBR PARA. It is not allowed to view and modify without
Manufacturers authorization, so please verify the password before view and modification. The modification
of CALBR PARA is similar with CUSTOMER PARA. Main function is shown as below.
Menu Preset Value Functions
MOTOR
A
TARGET CUR 0000 Enter the current value, the controller will detect user input value divided by
the current to the current value, calculate the current coefficient
COEF 1.000
Calibration current, the input coefficients. Controller displays the current
value = sample value × COEF
CUR ***.*A Displays the current controller sampling current values. This value is the real
value and cannot be set.
MOTOR
B
TARGET CUR 0000
Enter the current value, the controller will detect user input value divided by
the current to the current value, calculate the current coefficient
COEF 1.000
Calibrat
ion current, the input coefficients. Controller displays the current
value = sample value × COEF
CUR ***.*A
Displays the current controller sampling current values. This value is the real
value and cannot be set.
MOTOR
C
TARGET CUR 0000
Enter the curre
nt value, the controller will detect user input value divided by
the current to the current value, calculate the current coefficient
COEF 1.000
Calibration current, the input coefficients. Controller displays the current
value = sample value × COEF
CUR ***.*A
Displays the current controller sampling current values. This value is the real
value and cannot be set.
1.9 Operating Authorization and Password
Controller provides multiple passwords and access management. According to different levels of passwords,
controller provides different levels of operating authorization. Details are as following:
Customer Password: factory set ____________
Permissions: Allows to modify all Customer Parameter
Factory Password: fixed ____________
Permissions: Allows user to modify all Parameter
Calibrate Password: fixed ____________
Permissions: Allows user to modify CALBR PARAMETER

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2 Controller Function and Technical Parameter
 Phase sequence protection:
When compressor is at stop mode an detects open phase, response time <2ms
 Open phase protection
When any phase opens, the response time equals to set time: This fuinction is not activated when OPEN
PHASE PROTECTION time iss et over 20s
 Motor protection: This control unit has the following 5 basic protection functions to the motor and fan.
o Rotor lock protection: After the starting oft he motor, if the working current reaches 4 or 8 times oft he
set value, the protection activates. The activate time is less than 0,2s.
o Short.circuit protection: If the detected current reaches 8times or more above the set value, the
protection activates, the activate time is less then 0,2s
o Lack phase protection: Any oft the phase lack, the protection activates and theactivate time ist he
setting time
o Unbalance protection: The current difference between any of the two phases reaches the percentage
of the setting value, the protection activates and the activate time is less than 5s.
o Protection features of overload, please see following table for your reference. Multiple＝Iactual／Iset ,
response time is shown in following table according to overload multiples from 1.2 times an
3.0times.
Iact/Iset
Time Para
≥1.2 ≥1.3 ≥1.5 ≥1.6 ≥2.0 ≥3.0
response time (s) 60 48 24 8 5 1

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3 Model and Specification
 Main controller model description
MAM - 890 (B) (T) (40)
Max work current match with motor
RS485 communication
Pressure converter
890 controller
Products Series
 Power consumption table for corresponding motor
Parameter
Spec. Current Range
（A）
Adopted Host
Motor Power
（KW）
Remarks Descriptions
MAM—KY02S（20） 8～20 4～10
Fan has three levels of
current. Such as 0.2-2.5A,
1-5A and 4-10A,
determined by current of
motor.
MAM—KY02S（40） 16～40 8～20
MAM—KY02S（100） 30～100 15～50
MAM—KY02S（200） 80～200 40～100
MAM—KY02S（400） 160～400 80～200
MAM—KY02S（600/5） 100～600 50～300 Connect to
CT

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4 Overview
△
1211
C T 1
C
B
A
c
b
10 9 8 76 5 432
19
2021
C T 2
a
31302928
27
2625
24
23
22
FG
1
A
B
R S -48 5
C 1
、
ub uauc
13 14 15 16 17 18
Figure 4.2.1 Terminal arrangement diagram
Cable Connection of Controller：
1 Common terminal for digital input 2 Input terminal for emergency stop
signal
3 Input terminal for remote control
signal (on/off)
4 Input terminal used to detect oil
filter
5 N/A 6 RS485+
7 RS485- 8 Terminal for ground connection 9 Terminal for the AC20V power
source
10 Terminal for the AC20V power
source
11 N/A 12 N/A
13 Common terminal for digital
output
14 Terminal to control fan 15 Terminal to control load valve
16 Terminal to control delta
contactor
17 Terminal to control star contactor 18 Terminal to control main contactor
19 Input terminal to detect the
phase sequence and voltage
20 Input terminal to detect the phase
sequence and voltage
21 Input terminal to detect the phase
sequence and voltage
22 Power terminal for pressure
sensor
23 Input terminal to receive pressure
sensor signal
24 Terminal for motor CT1 input
25 Terminal for motor CT1 input 26 Terminal for motor CT1 input 27 Terminal for fan CT2 input
28 Terminal for fan CT2 input 29 Terminals for fan CT2 input 30 Terminal for discharge air
temperature sensor
31 Terminal for discharge air
temperature sensor
Attention: The magnetic coil must be connected to the surging absorber when wiring

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5 Control Process
Single Machine
Working principle (On/off mode: Local; Load mode: Auto)
①、 Press to start: (Y-△start)
The air compressor cannot be started by pressing until 5 seconds self-checking finished.
The start process of compressor is as followed: 18 terminal closed, KM2 is energized; 17 terminal
closed, KM3 is energized → Y start → STAR DELAY me starts record; when Y-△transfer time
over,17 terminal open, KM3 is de-energized and 16 terminal closed, KM1 is energized → motor
operates in △. (KM1 and KM3 are interlocked)
②、 Automatic operation control:
2.1: When motor enter delta status, LOAD DELAY starts, controller will load
automatically after LOAD DELAY.
2.2: If air pressure is detected higher than UNLOADING P set, 15 terminal opens, loading valve is
de-energized, and air compressor starts unloading, and also starts EMPTY DELAY time record,
if unloading time exceed EMPTY DELAY set, compressor will enter STANDBY mode; if
compressor loading again within “EMPTY DELAY” set (when pressure is below LOADING P or
receiving load command), compressor will reset “EMPTY DELAY”.
2.3: In STANDBY mode, controller start automatically if pressure detected is below LOADING P
③、 Manual loading/unloading operation under automatic status
3.1 When air pressure is between LOADING P and UNLOADING P, press
“loading/ unloading” to switch the current status of controller.
3.2 When air pressure is above the UNLOADING P, controller unloads
automatically, the loading/unloading button is invalid
3.3 When air pressure is below the UNLOADING P, controller loads
automatically, the loading/unloading button is invalid
④、 Normal stop:
Press , the loading magnetic valve will be de-energized, after a while of delay (stop delay),
all output relay stop working.
⑤、 The frequent starting control
Air compressor cannot start again immediately after NORMAL STOP, EMPTY LONG STOP or
FAILURE STOP. It can start again after START DELAY.

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 Remote Automatic Control (Control Mode: Remote; Load Mode: Auto)
In this mode, compressor can be turned on or off by remote control.
 Local Control (Control Mode: Local, Load Mode: Manual)
a. Control of start and stop are same as automatic control, but device is in status of unloading after
finish starting process.
b. In unload status, press to load. When air pressure is higher than UNLOADING P set, the
device will unload automatically.
c. If not press ,the device will run unload until EMPTY DELAY.
d. In load status, press to unload.
 Net Work
a. Controller works as slave when communication mode is set as “MODBUS”, and communicates
with monitoring center through MODBUS.
b. Controller and other controller can block work when communication mode is set “SEQ” but the
master only can service as 1# compressor.
 Fan Operation
When discharge air temperature is higher than FAN START T, fan operates; when discharge air
temperature is lower than FAN STOP T, fan stops.

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6 Alarm Function
6.1 Monitor text
6.1.1 Air filter alarm
1. Use switching signal to detect alarm
The monitor displays AIR FILTER BLOCK by checking air filter differential pressure switch
2. Set AIR filter max. time
The monitor displays AIR LIFE END when the run time of air filter exhausts
6.1.2 Oil filter alarm
1. Use switching signal to detect alarm
The monitor displays OIL FILTER BLOCK by checking oil filter differential pressure switch
2. Set OIL filter max. time
The monitor displays OIL LIFE END when the run time of the oil filter exhausts
6.1.3 O/A alarm
1. Use switching signal to detect alarm
The monitor displays O/A BLOCK by checking O/A filter differential pressure switch
2. Set O/A max. time
6.1.4 Lubricating oil alarm
1. Use switching signal to detect alarm
The monitor displays LUBE LIFE END when run time of lubrication oil exhausts
6.1.5 Grease alarm
1. Use switching signal to detect alarm
The monitor displays GREASE LIFE END when run time of the grease exhausts
6.1.6 Belt alarm
1. Use switching signal to detect alarm
The monitor displays BELT LIOFE END when the run time of Belt exhausts
6.1.7 High discharge air temperature alarm
1. Use switching signal to detect alarm
The monitor displays HIGH TEMPERATURE when controller detects the discharge air temperature is
higher than ALARM T set data in MANUFACTORY PARA

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7 Controller Protection
7.1 Motor Protection
MAM-860 air compressor controller provides overload, open phase, current unbalance, high voltage, low
voltage protection for motor and overload protection for fan.
Electronic Failure Failure Display Reason
Overload Display “MOTOR/FAN OVERLOAD” Overload, bearing wear and other mechanical failure
Phase failure Display “MOTOR OPEN PHASE” Power supply, contactor and open phase of motor
Unbalance Display “MOTOR UNBALANCE” Poor contact of contactor, inside open-loop of motor
7.2 Protection of High Discharge Air Temperature
When discharge air temperature is above the high limit of set temperature, the controller will send out the
alarm to shut down the machine. This fault displays HIGH T.
7.3 Protection of Air Compressor Reversal
When compressor stops and three phases sequence is not in order, this fault displays PHASE REVERSAL,
and the controller cannot star the motor. It is needed to check and alternate any two of the phase
sequence and investigate the motor rotation direction.
7.4 Protection of High Pressure
When the AIR P is above the STOP P, the controller will send out the alarm to shut down the machine. This
fault displays HIGH P
7.5 Protection of Sensor Failure
When pressure sensor or temperature sensor is disconnected, the controller will send out the alarm to
shut down the machine and this fault displays **SENSOR FAULT
7.6 Low Temperature Protection
When discharge air temperature is below LOW T PRO in manufacturing parameter, this fault displays P
SENSOR FAULT two minutes after compressor turns on, the controller will send out the alarm to shut down
the machine.

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8 Troubleshooting
When a fault occurs, the controller in the main interface displays the current fault content. For example,
when the pressure sensor failure, it displays the following interface:
Check the pressure sensor to confirm if there is any line broken or damage.
User can reset the error according to the following information:
Failure Causes Measurement to take
Air exhaust temperature too high Bad vent condition, Oil lacking etc. Check the vent condition and lubricant amount etc.
Temperature sensor failure Cable off or PT1OO damaged Checking the wiring and PT100
Over pressure The pressure too high or the
pressure sensor failure Check the pressure and the pressure sensor
Pressure sensor failure Cable off, Sensor damaged or the
cable connected reversed Check the wiring and sensor transformer
Lack phase Power phase lacking or the
Contactor terminal damaged Check the power and contactors
Overload
Voltage too low, tubes blocked,
bearing wear off or other
mechanical failure or wrong set
data etc.
Check the set data, Voltage, bearings, tubes and other
mechanical system.
Unbalance
Power unbalance, contactor
damaged or the internal open of
the motor
Check the power, contactors and the motor
Rotor lock
Voltage too low, tubes blocked,
bearing wear off or other
mechanical failure or wrong set
data etc.
Check the set data, Voltage, bearings, tubes and other
mechanical system.
Short circuit Wrong cable connection, wrong set
data Checking the wiring and set the data correctly
Wrong phase sequence Reversed Phase sequence or phase
off Check the wiring
Overload or Rotor locking during
starting process
Start time set too less than the star
delta time delay
Reset the host starting time to be longer than star delta delay
+ load delay time
Main Contactor activate time to
time The emergency button loose Check the wiring
Air exhaust temperature too high Bad vent condition, Oil lacking etc. Check the vent condition and lubricant amount etc.
Temperature sensor failure Cable off or PT100 damaged Checking the wiring and PT100
Overpressure The pressure too high Check the pressure and the pressure sensor
STOP:
P SENSOR FAULT