EMHEATER Frequently Asked Questions

How to Setup a custom Motor Frequency Limit for a VSD

When setting Motor Parameters for a VSD it includes a Frequency parameter (d0-03) which is used to specify the Motor Rated Frequency. In the event that there is a requirement to run a motor faster than its rated frequency (default = 50Hz) or limit it to not run faster than a specified lower frequency (less than the 50Hz default), the following parameters should be set:

  • d0-03 = Rated Frequency of the motor (see motor nameplate)
  • b0-12 = Digital Frequency Setting (default 50Hz, but cannot be set as more than b0-13 if that were modified) – Initial frequency if the frequency source is digital setting or terminal Up/Down.
  • b0-13 = Maximum Frequency (default 50Hz) – the Maximum Frequency that should be allowed for the Motor at any given time (irrespective of what means of input is used to set the Frequency). Minimum =50hz, so only required to set for motors that needs to run at a higher frequency.
  • b0-15 = Frequency Upper Limit (default = 50Hz, but cannot be set as less than b0-17 or more than b0-13 if that were modified), to prevent the motor from running too fast.
  • b0-17 = Frequency Lower Limit (default = 0Hz, but cannot be set as more than b0-15 if that were modified), to prevent the motor from running too slow.

How to Setup VSD Frequency Control using a Pressure Transmitter

VSD Frequency (motor speed – Hz) can be controlled using an external device such as Pressure Transmitter (PID). For parameter settings, please consider the following example:

Example/Requirements as follows:

  • PID: A 2-wire Pressure Transmitter is used requiring a 24VDC supply and with 0-10 Bar measurement range, providing a 4-20mA output (analogue output).
  • Connection: Connect the PID red cable to the VSD +24V terminal; Connect the green cable to the VSD AI2 terminal; Connect the VSD COM and GND terminals to each other.
  • Frequency Requirement: For this scenario the requirement is to fit a pressure transmitter at the bottom of a large dam/tank in order to measure how full/empty the dam/tank is. The requirement is then for the VSD to run a motor (pump) which fills the dam/tank at max speed when the dam/tank is empty (Pressure Transmitter will measure 0 Bar), and to gradually slow the speed of the motor as the dam/tank fills up, with the slowest speed ~ 40Hz – at which point the dam/tank is close to full. When the dam/tank is full (Pressure Transmitter will measure 5 Bar) the VSD must switch off.

VSD Parameters to be set as follows:

  • b0-02 = 1 (set Command Source selection = Terminal Control)
  • b0-03 = 3 (Set Min Frequency Source to use AI2 – ensure jumper is set to “I”)
  • b0-17 = 40 Hz (Set the Frequency Lower Limit)
  • b2-17 = 1 (Set Running Mode to STOP when the set frequency is less than the Lower Limit frequency)
  • b5-12 = 2 (Set AI2 Minimum Value = 2mA)
  • b5-13 = 100 (Set corresponding value (Frequency) = 100% (50Hz) if AI2 = Minimum Value above)
  • b5-14 = 6 (Set AI2 Maximum Value = 6mA which corresponds to 12mA/5Bar)
  • b5-15 = 79.9 (Set corresponding value (Frequency) = 79.9% (39.95Hz) if AI2 = Maximum Value above)

How to Setup Motor Protection for a VSD

VSDs include standard overload protection for motors as follows (Overload Capacity):

  • G type:150% rated current 60s; 180% rated current 3s.
  • P type: 120% rated current 60s;150% rated current 3s.

For additional Motor Protection the following settings can be set to limit load current:

  • bd-00 (Overset alarm current value): Us this to specify the Current Limit (Amps) .
  • bd-01: (Overcurrent alarm delay time): Use this to specify the Time Delay (Seconds) to allow for.

For example: If a 4KW inverter rated current is 9A but the requirements is to protect the motor when the load current reaches 6A for more than 5s, Set: bd-00 = 6 and bd-01=5. If the load current exceeds this specified current and time limit, an Err24 protection error will be displayed and the VSD will stop.

How to Setup a Soft Starter for specific Motor Parameters

To setup a Soft Starter for a specific motor (smaller than the Soft Starter kW Rating):

  • Make sure to set FP (Motor Rated Current) = to the motor rated current.
  • Also adjust F6 (Soft Starter Maximum Current) if this is too high for the applicable motor.
  • In case of an Error 05, please set FA (Protection Level) = 2.

How to Setup a Solar Drive to use AC Input

To use a Solar Drive as a normal Variable Speed Drive with an AC input power supply (no Solar), please set the following:

  • FE-00 = 0 (PV Inverter Disabled)

How to Setup a Solar Drive for specific Motor Parameters

To setup a Solar Drive for a specific motor:

  • Make sure that all Motor Parameters has been set (F1-01 up to F1-05)

F1-01: Motor Rated Power
F1-02: Motor Rated Voltage
F1-03: Motor Rated Current
F1-04: Motor Rated Frequency
F1-05: Motor Rated Speed

  • Perform Autotuning if applicable/required.

*For borehole applications, to protect the pumps from running too slow during low sunlight periods, please adjust FE-19 (detection frequency of low frequency protection). The FE-19 default = 10Hz, adjust it to ~ 25Hz (please confirm with the pump manufacturer what the lowest acceptable speed for the pump is to prevent damage).

How to Reset a Solar Drive (Factory Restore)

To Reset a Solar Drive to its factory settings, set FP-01 equal to one of the following values (depending on the requirement):

  • FP-01 = 1(This will restore Default Settings except: Motor Parameters, Frequency Command Resolution / Frequency Unit (F0-22), Fault Records, Accumulative Power-On time (F7-13), Accumulative Running Time (F7-09), and Accumulative Power Consumption (F7-14)).
  • FP-01 = 2 (This will restore Device Records which includes the Fault Records, Accumulative Power-On time (F7-13), Accumulative Running Time (F7-09), and Accumulative Power Consumption (F7-14) which is not reset if FP-01 is set equal to 1).

To Backup or Restore parameter settings, set FP-01 equal to one of the following values (depending on the requirement):

  • FP-01 = 4 (This will make a backup of the Motor Parameters which can then be restored again if needed).
  • FP-01 = 4 (This will restore a previous backup that has been made of the Motor Parameters if needed).

How to Setup an Emergency Stop for a VSD

  • Set b1-07 = 0 (default)
  • Set deceleration time to a short time
  • For VSDs more than 22KW, a brake unit and brake resistor is also needed.
  • For VSDs up to 22kW a brake resistor is already built in, but an additional brake unit might be required depending on the application.

From the External Device, connect the Normally Closed wire with DI1 and Common with Common and then set:

  • Set b3-00 = 44 (Emergency Stop)
  • If the External Device is Normally Open, also set b3-25 = 1

How to Setup an External Device to read the VSD On/Off Status

  • Connect a relay output to monitor whether the inverter is running or not (inverter status)
  • If you use Relay 1, set b4-02 = 2

How to Setup a Manual Switch for Multi Speed Selection on a VSD

  • Connect Terminals as follows:
    • DI3 connect to COM
    • DI4 connect to COM
    • DI5 to COM
  • Set the following Settings:
    • b0-02=1
    • b0-03=6
  • Set C1 ratings based on Speed requirements, eg:
    • C1-01 = 100%
    • C1-02 = 80%
    • C1-03 = 60%

How to Setup an External Fault Device to Stop a VSD

Setup an External Fault Device to Stop a VSD (but still use Keypad Start/Stop function):

From the External Device, connect the Normally Open or Normally Closed wire with DI1 and connect the Common wire with Common and then set:

  • If it is a Normally Open connection:
    • b3-00 = 38 (default = 01)
  • If it is a Normally Closed connection:
    • b3-00 = 39 (default = 01)

 

In this scenario, keep b0-02 = 0 (Default: Keypad Control) to allow for the VSD to Start/Stop using the VSD keypad. If the External device Stops the VSD the VSD will show Err15 which indicates that the external fault device caused the VSD to stop.

How to Setup an External Stop/Start Button for a VSD

From the External Device, connect the Normally Open wire with DI1 and the Common wire with Common and then set:

  • b0-02 = 1 (terminal control)

If the External Device only has a Normally Closed connection (not Normally Open) the VSD Start/Stop function will operate in the opposite way intended. In this case, also set:

  • b3-25 = 00001(Low Level Valid)

For a 3 Line Control External Device:

From the External Device, connect the Normally Open wire with DI1, the Normally Closed wire with DI3 and the Common wire with Common and then set:

  • b0-02=1 (Terminal Control)
  • b3-02=3 (Three Line Control)
  • b3-13=2 (Three Line Mode 1)

How to Reset a VSD (Factory Restore)

To Reset a VSD to its factory settings, set A0-09 equal to one of the following values (depending on the requirement):

  • A0-09 = 1(This will restore Default Settings except: Motor Parameters, Frequency Command Resolution / Frequency Unit (b0-11), Fault Records, Accumulative Power-On time (b9-08), Accumulative Running Time (b9-09), and Accumulative Power Consumption (b9-10)).
  • A0-09 = 4 (This will restore Device Records which includes the Fault Records, Accumulative Power-On time (b9-08), Accumulative Running Time (b9-09), and Accumulative Power Consumption (b9-10) which is not reset if A0-09 is set equal to 1).
  • A0-09 = 2 (This will restore all Device Records and all Default Settings – including the Motor Parameters which is not reset if A0-09 is set equal to 1).

How to Setup a VSD for specific Motor Parameters

To setup a VSD for a specific motor:

  • Make sure that all Motor Parameters has been set (d0-00 up to d0-04)

d0-00: Motor Rated Power
d0-01: Motor Rated Voltage
d0-02: Motor Rated Current
d0-03: Motor Rated Frequency
d0-04: Motor Rated Speed

  • Perform Autotuning if applicable/required.

How do Collection/Delivery Work

EMHEATER stock is stored in Pretoria, but we deliver nationwide via courier service and also export to other southern African countries. It is also possible to make arrangements to collect items in Pretoria.

How to Reset a Soft Starter (Factory Restore)

For a GW Series Soft Starter:

1.Switch off all electricity supply.

2.Pres the YES key on Soft Starter and hold it in whilst switching on the electricity supply.

3.Keep the YES key pressed for 5 seconds after switching on the electricity supply and then release.

4.After doing the Factory Restore set FA to 1 or 2.

How to perform Soft Starter Error 4 Troubleshooting

Error 4 Reasons (for a GW Series Soft Starter):

1.Input Power Source Voltage is not Balanced

  • Check the 3-Phase input voltages

2.A possible Settings problem

  • Can restore factory settings

3.Thyristors’ main circuit or control circuit problems

  • There are 3 groups of red and white cables
  • One group has 2 red and white cables
  • Test the resistance between each group’s red and white cable (~ 10V but up to 20V fine)
  • Use buzzer position – one probe to R and one to U (S to V and T to W)

4.Control Board Problems

  • Check that the control board light is blinking.

5.Transformer Voltage

  • Measure the transformer voltage
  • There are 6 small cables
  • Two yellow cables voltage should be about 18v to 20V
  • Two green cable voltage should be about 9V

How to Autotune a Solar Drive

Set the following:

  • Set F1-01~F1.05 according to pump nameplate
  • Set F1-37 = 1 for static auto tuning (if F0-02=1, first set it to 0, for autotuning)

How to Setup a Solar Drive to Stop/Start based on Sunlight

Set the following:

  • F0-02=1 (terminal control)

Also connect  DI1 to COM

How to Autotune a VSD

To autotune a VSD for a specific motor:

  • First make sure that all Motor Parameters has been set (d0-00 up to d0-04)
  • If the motor can be disconnected from the load:
    • Set d0-30 = 2 and press ENTER
  • If the motor cannot be disconnected from the load:
    • Set d0-30 = 3 and press ENTER
  • Press RUN to start the autotuning process.
  • The VSD and Motor will go through a short working process and stop by itself, after which the d0-05 up to d0-09 parameters would have been optimised.

d0-05: Stator resistance (asynchronous motor)
d0-06: Rotor resistance (asynchronous motor)
d0-07: Leakage inductive reactance(asynchronous motor)
d0-08: Mutual inductive reactance(asynchronous motor)
d0-09: No-load current(asynchronous motor)

*When using a single VSD to run more than one motor, do not perform autotuning.