SJE Rhombus H2O Drive RD150 User manual

H2O Drive®
Constant Pressure Control Panel
For Submersible Well Pumps
User Manual
RD150 / RD300 / RD500 / RD750
Technical support: [phone]
[email protected]
www.sjerhombus.com
Technical Support Hours: Monday-Friday, 7 A.M. to 6 P.M. Central Time
RUN FWD
37.4 Hz
3.74 A
HAND OFF
57.4 psi
AUTO

TABLE OF CONTENTS
WARNINGS............................................................................................... 1
INCLUDED IN THE H2O DRIVE®PANEL PACKAGE ................... 2
SYSTEM OVERVIEW............................................................................. 3
INTRODUCTIONS & SPECIFICATIONS............................................. 4
SELECTING THE CORRECT VFD ...................................................... 5
HYDROPNEUMATIC TANK.................................................................. 5
MINIMUM CAPACITY OF PRESSURE TANK ................................... 5
INITIAL PRESSURE TANK CHARGE PRESSURE .......................... 6
H2O DRIVE®PANEL INSTALLATION & MOUNTING.................... 6
DIMENSIONS ...........................................................................................7
ELECTRICAL CONNECTIONS DIAGRAM ............................................ 8
TERMINAL CONNECTIONS................................................................. 9
SURGE PROTECTIVE DEVICE (SPD)................................................ 9
MOTOR CABLE LENGTHS .................................................................. 9
PROGRAMMING ....................................................................................10
PARAMETER DESCRIPTIONS ...........................................................13
TUNING & TROUBLESHOOTING GUIDE.........................................17
ERROR MESSAGES .............................................................................18
SCHEMATICS ........................................................................................19
SJE Rhombus® H2O Drive®Panel Operation Manual

WARNINGS
Failure to read and understand the information provided in this manual may result in personal injury
or death, damage to the product or product failure. Please read each section in its entirety and be
sure you understand the information provided in the section and related sections before attempting
any of the procedures or operations given.
SJE Rhombus® 1 H2O Drive®Panel Operation Manual
Failure to follow these precautions could result in serious injury or death. Keep
these instructions with warranty after installation. This product must be installed in
accordance with National Electrical Code, ANSI/NFPA 70 so as to prevent moisture
from entering or accumulating within the controller housing.
See additional specifications on page 3 of this manual.
ELECTRICAL SHOCK HAZARD
Disconnect power to the H2O Drive®Panel and wait 10 minutes before
removing any cover.
A qualified service person must install and service this product
according to applicable codes and electrical schematics.
EXPLOSION OR FIRE HAZARD
Do not use this product with flammable liquids. Do not install in
hazardous locations as defined by National Electrical Code,
ANSI/NFPA 70.
• Lethal voltages are still present inside the H2O Drive®Panel after power is
disconnected. Wait 10 minutes to allow internal capacitors to fully discharge before
attempting to connect or disconnect wiring or to service this equipment.
• Do not connect incoming power to motor terminals U, V, W. Doing so will result in
irreversible damage to the drive.
• Do not connect power to this equipment if it has been damaged or has any missing
parts.
• Verify that the incoming voltage supply matches the H2O Drive®Panel rating before
applying power to the unit.
• The H2O Drive®Panel contains no serviceable parts, do not attempt to repair this
equipment.
• The H2O Drive®Panel must be grounded at the grounding terminal according to
N.E.C. Refer to the electrical connections page.
• Do not install in areas with: excessive or conductive dust, corrosive or flammable
gas, excessive heat, regular impact shocks or excessive vibration.
• Do not install in areas where ambient temperature exceeds 40ºC (104ºF).

INCLUDED IN THE H2O DRIVE®PANEL PACKAGE
1. H2O DRIVE®Panel VFD controller (RD150, RD300, RD500 or RD750)
2. Pressure transducer (0-150 PSI range) 4-20mA output signal
3. Pressure transducer cable (5m – 16.4 ft)
4. Strain reliefs (x3)
5. User manual
Verify that all components are included and the H2O Drive®Panel model number is correct.
5
2
3
1
4
RUN FWD
37.4 Hz
3.74 A
HAND OFF
57.4 psi
AUTO
SJE Rhombus® 2 H2O Drive®Panel Operation Manual

Pressure
Tank
Pressure
Transducer
Pressure
Relief Valve
ATTENTION!
A pressure relief valve
is recommended.
Well Pump
230V, 3 phase Motor Incoming Power
230V, Single Phase (RD150, RD300, RD500)
230V, Three Phase (RD500, RD750)
Floor Sensor
(Optional)
Float Switch
(Optional)
H2O Drive®
SYSTEM OVERVIEW
RD150, RD300, RD500 and RD750
SJE Rhombus® 3 H2O Drive®Panel Operation Manual

INTRODUCTION & SPECIFICATIONS
Congratulations and thank you for your purchase of the H2O Drive®control panel. This manual
explains the features and operations of the controller which was designed to operate one well
pump in a pressure control application. The controller automatically controls the operation and
speed of the pump based on the signal from the pressure transducer.
GENERAL
• One Variable Frequency Drive well pump pressure controller
• Operates using a 0-150 PSI pressure transducer (4-20mA)
• HMI - Rotary selector for menu navigation and editing settings
• HMI - High-Brightness 2.4” color graphic LCD display, 240X320 pixel resolution
PUMP CONTROL AND PROTECTION
• Pump run indication
• Pump speed (Hz) and Amps (A) indication
• Pump motor overload protection
• High- and low-pressure alarms
• Pump dry run alarm and well recharge timer
• Floor water sensor and low level switch alarm/shutdown
SYSTEM
• Pump run time
ELECTRICAL SPECIFICATIONS
• Input voltage: 240V nominal
- 200-240V 50Hz/60Hz, single phase for RD150 & RD300
- 200-240V 50Hz/60Hz, three phase/single phase for RD500
- 200-240V 50Hz/60Hz, three phase for RD750
• Output 0-240V, three phase, 0-60Hz capable of operating up to 80Hz
Note: The output voltage cannot exceed the input voltage.
DEDICATED I/Os
• Pressure transducer input, 4-20mA, two wire
• 2 Auxiliary alarm inputs (Low level, Floor water sensor) Dry contact only
• 1 alarm relay output (N.O). 230V, 0.3A Max
ENVIRONMENT
• Surrounding air temperature: 14°F to 104°F (-10°C to 40°C)
• Panel internal temperature: 14°F to 122°F (-10°C to 50°C)
• Storage temperature -4°F to 131°F (-20°C to 55°C)
• Altitude: Maximum of 3280 ft (1000m) above sea level
• Outdoor rated enclosure (UL Type 3R)
SJE Rhombus® 4 H2O Drive®Panel Operation Manual

SJE Rhombus® 5 H2O Drive®Panel Operation Manual
PART
NUMBER MODEL DESCRIPTION
RATED
AMPS¹
S.F.
AMPS² HP INPUT OUTPUT
ENCLOSURE
DIMENSION
SHIPPING
WEIGHT
1076917 RD150 H2O DRIVE - 1.5HP 7.0A 7.3A 0.5/0.75/1.0/1.5 230V, 1PHASE 230V, 3PHASE 14X12X6 16.4 lbs
1076918 RD300 H2O DRIVE - 3.0HP 10.0A 10.9A 2.0/3.0 230V, 1PHASE 230V, 3PHASE 14X12X6 17.4 lbs
1076919 RD500 H2O DRIVE - 5.0HP 15.9A 17.8A 5.0 230V, 1 or 3PHASE³230V, 3PHASE 18X16X10 32.7 lbs
1077249 RD750 H2O DRIVE - 7.5HP 31.8A 31.8A 7.5 230V, 3PHASE 230V, 3PHASE 18X16X10 28.7 lbs
¹ VFD rated Amps. 150% OL for 60 sec., 200% for 0.5 sec (Constant torque - UL listed)
² VFD Amps for pumps: 120% for 60 sec. (Variable Torque)
³ VFD UL rated for 3 phase input
SELECTING THE CORRECT VFD
1. Determine the voltage available on site.
2. Select a pump with the same voltage (motor must be 3 phase).
3. Check pump motor nameplate Service Factor Amps (SFA) for proper VFD sizing.
4. Select a VFD with an output amps rating greater or equal to motor SFA.
5. The motor and VFD must be oversized for operation >60Hz. Consult the pump MFR for sizing.
HYDROPNEUMATIC TANK
To maintain constant pressure and prevent rapid cycling, a hydropneumatic tank (pressure tank)
is needed in the system (refer to the minimum capacity of pressure tank table below). The
H2O Drive®Panel may use a pressure tank of a larger capacity than listed in the table.
MINIMUM CAPACITY OF PRESSURE TANK
Flow Rate Model Min. Tank Volume
< 12.0 GPM RD150 2 Gallons
RD300 4 Gallons
> 12.0 GPM RD150 4 Gallons
RD300 8 Gallons
For 5HP & 7.5HP, the minimum tank size should be >20% of the rated ow. For example, a pump
designed to deliver up to 100 GPM would require a minimum tank size of 20 gallons.

SJE Rhombus® 6 H2O Drive®Panel Operation Manual
INITIAL PRESSURE TANK CHARGE PRESSURE
Set Pressure Pre-charge Pressure
40 PSI 28 PSI
45 PSI 32 PSI
50 PSI 35 PSI
55 PSI 39 PSI
60 PSI 42 PSI
65 PSI 46 PSI
70 PSI 49 PSI
75 PSI 53 PSI
1. Initial charge pressure should be at least 70% of the system pressure.
2. To maintain the optimum pressure level, check the air pressure in the tank regularly.
3. Pre-charge pressure must be set when the tank is empty and vented.
H2O DRIVE®PANEL INSTALLATION & MOUNTING
1. The H2O Drive®Panel is designed for outdoor installations.
2. The control panel can be wall or post mounted.
3. Mount vertically using four (4) screws.
4. Avoid locations with direct sunlight exposure.
5. Locate near the well head, keeping the motor cable as short as possible.
6. Liquid tight conduits required for outdoor installations.

SJE Rhombus® 7 H2O Drive®Panel Operation Manual
RD150 & RD300 DIMENSIONS
RD500 & RD750 DIMENSIONS
15.59”
16.36”
9.25”
14.20”
7.80”
19.37”
20.18”
18.00”
14.02” 11.07”

SJE Rhombus® 8 H2O Drive®Panel Operation Manual
Electrical Connections Diagram
RD150 & RD300
Pressure
Transducer
0-150 PSI Well Pump
230 VAC. 3 Phase
Pump
Cable
230VAC, 60Hz
(200-240VAC)
SINGLE PHASE
INCOMING POWER
RED
YEL
BLK
BRN
BLU
Electrical Connections Diagram
RD500 & RD750
Pump
Cable
Well Pump
230 VAC. 3 Phase
Pressure
Transducer
0-150 PSI
RED
YEL
BLK
230VAC, 60Hz
(200-240VAC)
THREE PHASE
INCOMING POWER
(CONNECT L1 & L2 ONLY
FOR SINGLE PHASE
INCOMING POWER
- RD500 ONLY)
BRN
BLU

SJE Rhombus® 9 H2O Drive®Panel Operation Manual
TERMINAL CONNECTIONS
Symbol Function
BN (BROWN) 24 VDC Pressure Transducer power
BU (BLUE) 4-20mA signal from Pressure Transducer
CM, S1 CM = Signal Common. S1 = Floor Sensor Input (Dry Contact Only)
CM, S2 CM = Signal Common. S2 = Low Water Input (Dry Contact Only)
RC, RA Alarm Relay Output. 230VAC 0.3A max, 30VDC 0.3A max
L1, L2 Incoming Power (RD150, RD300)
L1, L2, L3 Incoming Power (RD500, RD750)
G Motor Ground
U, V, W Pump Motor Connection
SURGE PROTECTIVE DEVICE (SPD)
A Surge Protective Device (SPD/lightning arrestor) will reduce problems resulting from power surges
and lightning; however, 100% protection is not achievable. The SPD must be connected to the input
power terminals. Do not connect the SPD to the pump motor output terminals of the H2O Drive®Panel.
MOTOR CABLE
MAXIMUM MOTOR CABLE LENGTHS
Cable type:
4 conductor (3W + GND) shielded cable is recommended for optimum operation and noise
suppression. Unshielded cable can be used if ran in metal conduit. Do not use flat cable. Do
not use 3 separate/untwisted conductors. Do not use cables without a ground conductor.
Motor Cable sizing:
Select the motor cable from the table below.
Motor Incoming Power Motor Cable Length (75C)¹ (Feet)
MODEL HP SFA² AWG CB 14 AWG 12 AWG 10AWG 8AWG
RD150
1/2HP 2.9A 14 15A 800
3/4HP 3.9A 14 15A 650
1.0HP 4.7A 12 15A 550
1.5HP 6.1A 12 25A 410 650
RD300 2.0HP 8.1A 10 25A 320 500 800
3.0HP 10.1A 10 30A 240 380 600
RD500 5.0HP 17.5A 6 50A 140 230 350 550
RD750 7.5HP 26.4A 6 60A³150 250 400
¹Cable length is measured from H2O Drive®Panel to the motor.
²Data is based on 230V motor, 3 phase operating at 60Hz Max. Check motor name plate.
³Requires 3 phase input power and 3-pole Circuit Breaker (MCCB).
For cable lengths greater than 800 ft., please contact factory.
Do not use flat cable. Use round cable with twisted conductors (3 wire + ground).
75C Insulation - AWG Copper Wire only. Do not use aluminum conductors.
Use shielded cable or run cable in metal conduit to reduce Radio Frequency Interference (RFI).
The motor must only be grounded in the control panel. Do not also ground at the well head or disconnect.

SJE Rhombus® 10 H2O Drive®Panel Operation Manual
PROGRAMMING
HMI MAIN SCREEN
The main screen shows an overview of the system status including any active alarms.
USER INTERFACE
Color Liquid Crystal Display
(LCD)
Menu Navigation
And ENTER Dial
Run Status
RUN FWD
37.4 Hz
3.74 A
HAND OFF
57.4 psi
AUTO
Menu
System Pressure
Output Frequency
Output Amps
Hand/O/Auto Selection
Password Protection
Indicator

SJE Rhombus® 11 H2O Drive®Panel Operation Manual
MAIN MENU
PRESS - ENTER
Main Menu
Pressure Setting
Used to set the desired system pressure.
Motor S.F. Amps
Used to set the service factor amps of the
pump motor.
Motor Run Time
View the accumulated run time of the pump.
Alarm History
View the history of the last 10 stored faults.
I/O Status
View the status of the H2O Drive’s analog
input, digital inputs, and alarm relay output.
VFD Status
View the H2O Drive’s status. This includes
output voltage, output current, output
frequency, output power, and DC bus voltage.
HMI Setup
Used to congure the display’s color theme,
as well as set up the password protection.
Advanced
Used to set advanced functions.
RUN FWD
37.4 Hz
3.74 A
HAND OFF
57.4 psi
AUTO
ROTATE
RUN FWD
37.4 Hz
3.74 A
HAND OFF
57.4 psi
AUTO

SJE Rhombus® 12 H2O Drive®Panel Operation Manual
Setting Min. Max. Units Default Description
Enter Password 00-00 99-99 00-00 Only displays if a password is required.
Pressure Setting 0Transducer Range PSI 60 Enter the target pressure to maintain
Motor S.F. Amps
1.80 7.50
A
5.90 RD150 default set for: 1.5HP, 230V, 60Hz, 5.9
SFA
2.50 11.00 10.90 RD300 default set for: 3.0HP, 230V, 60Hz,
10.9 SFA
8.00 17.80 17.80 RD500 default set for: 5.0HP, 230V, 60Hz,
17.8 SFA
8.00 31.80 26.40 RD750 default set for: 7.5HP, 230V, 60Hz,
26.4 SFA
HMI Setup Menu
Color Theme Blue/Dark, Green/Dark Green/Dark The color palette used for the display.
Password Setup 00-00 99-99 00-00 Will not display if the user has not yet entered
the correct password. 00-00 will disable pass-
word protection.
Advanced Menu
Start Pressure Diff. 0Set Pressure -1 PSI 5 Pressure drop before starting the pump (Wake
up).
High Pressure Alarm 0 Transducer Range PSI 80 Will automatically be set 20 PSI above
Pressure Setting during Quick Start.
Low Pressure Alarm 0Set Pressure -1 PSI 15
Low Pressure Delay Time 0 999 sec 30
Dry Run Amps 0.00 Motor S.F. Amps A 0.00 0.00A = Dry Run Disabled
Dry Run Delay Time 0 999 sec 20
Dry Run Reset Mode Auto-Reset Manual-Reset Auto-Reset
Dry Run Recharge Time 0.1 9.9 hr 1.0
Motor Voltage 200.0 240.0 V 230.0 Motor nameplate Voltage. Cannot be greater
than the measured incoming voltage to the
control panel.
Sleep Frequency 0.00 Max Frequency Hz 35.00 Frequency at low ow. Timer will start when
Hz < Sleep Hz.
Sleep Time 0.0 3600.0 sec 10.0 Delay before stopping the pump in sleep mode
(no ow).
Min. Frequency 20.00 Max Frequency Hz 30.00 Lowest Hz the pump is allowed to Run before
Stopping in sleep mode.
Max. Frequency 35.00 80.00 Hz 60.00 Highest Hz the pump is allowed to Run when
Pressure < Set Pressure. Do not set >60Hz
without consulting with the pump manufac-
turer and sizing the motor/VFD correctly.
Accel 0.0 300.0 sec 2.0 Acceleration rate (time from 0Hz to 60Hz).
Decel 0.0 300.0 sec 2.0 Deceleration rate (time from 60Hz to 0Hz).
PID - Proportional 0.1% 500.0% % 35.0% Expert users only.
PID - Integral 0.1 100.0 sec 1.0 Expert users only.
Transducer Range 1 300 PSI 150 Match the pressure transducer range.
Transducer Offset -10.0 10.0 PSI 0.0 Used to adjust the pressure transducer read-
ing higher or lower.
HAND Run Time 0 999 min 5 The timer will stop the pump when
operating in Manual. 0 = no timeout
(Continuously Run at Manual Hz)
HAND Speed 30.00 Max. Frequency Hz 45.00
Carrier Frequency 0.7 10 kHz 2
Motor Auto-Tune - - - - Automatically measures and sets motor
parameters for the most eicient operation.

SJE Rhombus® 13 H2O Drive®Panel Operation Manual
PARAMETER DESCRIPTIONS
BASIC SETTINGS
• Enter Password
If password protection has been enabled in the Password Setup menu, the user must enter the
correct password to be allowed to change any settings. Once entered correctly, the settings
are “unlocked” and may be edited. After no inputs from the user for 5 minutes, these settings
will become “locked” until the correct password is entered once again.
• Pressure Setting
Pressure Setting is the target pressure to be maintained at the pump discharge. It cannot
exceed the maximum range of the pressure transducer.
• Motor S.F. Amps
The VFD’s electronic overload will signal an overload fault and protect the motor from damage
in the event of an overload condition. Set the Motor S.F. Amps setting to the motor nameplate
Service Factor Amps (SFA) for submersible pumps.
HMI SETUP
• Color Theme
This adjusts the colors used in the HMI display screens.
• Password Setup
When a password is set up, the user will only be able to view settings on the HMI but cannot
change them, unless they first enter the correct password in the Enter Password menu. Set
Password Setup to any 4-digit password 00-01 through 99-99 to enable this password
protection. Be sure this is a password you will remember, or write the password down in a
secure location for your future reference. Set Password Setup to 00-00 to disable password
protection. Note: When password protection is enabled, this setting will not be accessible until
the user enters the correct password in the Enter Password setting.
ADVANCED SETTINGS
• Start Pressure Diff.
The Start Pressure Diff. is the amount of pressure drop from the Pressure Setting, at which
the VFD will wake from sleep and run to maintain the system pressure. The pump will start if
the pressure drops below the Pressure Setting minus the Start Pressure Diff. Example: If the
Pressure Setting is 40 PSI and the Start Pressure Diff. is 5 PSI, the pump will start when the
pressure drops below 35 PSI.
• High Pressure Alarm
Set the High Pressure Alarm setting to the pressure at which the VFD output will shut off due
to high system pressure. There is a 2 second delay before the VFD will activate the High
Pressure Alarm. If system pressure drops below the High Pressure alarm setting for 10 seconds,
the high pressure alarm will automatically reset and normal operation of the VFD will resume.
• Low Pressure Alarm
The Low Pressure Alarm will activate when both of the following conditions persist for the
amount of time defined in Low Pressure Delay Time:
1) The pump is running at Max. Frequency.
2) The measured pressure is below the Low Pressure Alarm setting.
This alarm will stop the pump, and must be manually reset. Set Low Pressure Alarm to “0” to
disable the alarm.

SJE Rhombus® 14 H2O Drive®Panel Operation Manual
• Low Pressure Delay Time
Delay before stopping the pump on Low Pressure Alarm (default 20 sec).
• Dry Run Amps
The Dry Run Amps alarm will activate when all three of the following conditions persist for the
amount of time defined in Dry Run Delay Time:
1) The pump is running at Max. Frequency.
2) The measured pressure is below the Pressure setting.
3) The pump current is below the Dry Run Amps setting.
This alarm will stop the pump, and can be reset manually or automatically, depending on the Dry
Run Reset Mode setting. While the above three conditions are true, a Dry Run warning will
display on screen showing a timer counting down to the Dry Run Alarm trip. Set Dry Run Amps
to 0.00 to disable Dry Run detection.
• Dry Run Delay Time
Delay before stopping the pump on a Dry Run Alarm.
• Dry Run Reset Mode
If Dry Run Reset Mode is set to Auto Reset, once a Dry Run Alarm is active, a countdown timer
will begin according to the Dry Run Recharge Time setting. After that timer reaches zero, the
Dry Run alarm will be cleared, and the pump will be allowed to run again. If Dry Run Reset
Mode is set to Manual Reset, then the user must reset a Dry Run Alarm manually through the
main screen.
• Dry Run Recharge Time
Delay before automatically re-starting the pump after a Dry Run Alarm.
• Motor Voltage
Set the Motor Voltage setting to the voltage rating found on the motor nameplate. This value
must not exceed the voltage of the incoming power.
• Sleep Frequency
Set the Sleep Frequency to the frequency at which the pump no longer builds pressure when
operating at or near the Set Pressure. The VFD will enter the “sleep” mode when the output
frequency of the VFD drops below the Sleep Frequency for a period of time (Sleep Time).
• Sleep Time
Set the Sleep Time to the amount of time that the VFD will wait before entering “Sleep”mode
after the output frequency drops below the Sleep Frequency. Note: If the system cycles on
and off too frequently, try the following: increase the Sleep Time, lower the Sleep Frequency,
or increase the Start Pressure Diff. A combination of changes of all three settings may be
necessary. If the VFD does not enter “Sleep” mode when there is no flow of water in the
system, the Sleep Frequency must be increased.
• Min. Frequency
The Min Frequency should be set to the minimum output frequency that the pump should be
allowed to run. Contact your pump manufacturer to obtain the pump safe operation ranges.
• Max. Frequency
The Max Frequency should be set to the maximum output frequency that the pump should
be allowed to run. Contact your pump and motor manufacturer for motor selection and
operation above 60 Hz.
• Accel.
Set the Accel. time to the rate at which the output frequency will accelerate from 0Hz to
60Hz. Example: If the pump is required to accelerate from stop to 30Hz in 1 second, the Accel.
time should be set to 2 seconds.

• Decel.
Set the Decel. time to the rate at which the output frequency will decelerate from 60Hz to
0Hz Example: If the pump is required to decelerate from 30Hz to a stop in 4 seconds, the
Decel. time should be set to 8 seconds.
• PID - Proportional
The PID - Proportional term is intended to be adjusted by advanced users only.
The PID Proportional term is used to adjust the reaction of the output frequency to changes
in the system pressure. Decreasing the PID - Proportional term will allow the VFD to make
larger corrections to the output frequency with differences between the Set Pressure and
actual system pressure. Increasing the PID - Proportional term will allow the VFD to make
smaller corrections to the output frequency with differences between the Pressure Setting
and actual system pressure.
• PID - Integral
The PID - Integral term is intended to be adjusted by advanced users only. The PID - Integral
term is used to adjust how quickly the output frequency reacts to changes in the system
pressure. Decreasing the PID Integral term will allow the VFD to make quicker corrections to
the output frequency with differences between the Pressure Setting and actual system
pressure. Increasing the PID Integral term will allow the VFD to make slower corrections to the
output frequency with differences between the Pressure Setting and actual system pressure.
• Transducer Range
If using a different transducer other than supplied, set the Transducer Range to the full span
rating of the pressure transducer. The Pressure Setting and Start Pressure Diff. values must
also be updated after changing the Transducer Range, as these values are automatically
scaled based on the Transducer Max Range.
• Transducer Offset
The measured pressure can be adjusted up or down as desired to adjust to any small offset
errors that may be present. For example, if there are other pressure gauges in the system
more accurate than the VFD’s 4-20mA sensor. Adjust the Transducer Offset value to a positive
or negative value as needed until the displayed pressure shows the desired reading. This
positive or negavite value will be added to all pressure readings.
• HAND Run Time
When in HAND, the pump will run at the HAND Speed for the number of minutes set in HAND
Run Time if the user does not switch back to OFF or AUTO before that. The pump will stop
when the HAND Run Time is done, at which point the controller will switch back to OFF mode.
Set to 0 minutes to disable this protective function, allowing the pump to run in HAND mode
indefinitely.
• HAND Speed
This is the constant speed at which the pump will run while it is in HAND mode.
• Carrier Frequency
This is the PWM switching frequency for the VFD inverter output.
SJE Rhombus® 15 H2O Drive®Panel Operation Manual

SJE Rhombus® 16 H2O Drive®Panel Operation Manual
• Motor Auto-Tune
This function will automatically measure and set detailed motor parameters into the VFD to
more efficiently control the pump speed and torque. Run this function if an E.OC1 fault occurs
upon startup. Input the motor horsepower and motor nameplate voltage, then select START.
The display will indicate the Auto-Tune in progress and when the tuning is complete.
Auto-Tune Results and Actions
Result Text Displayed Action to Take
Success Exit Menu and check for proper operation.
-- Tuning in progress Wait for Auto-Tune to complete.
Failed (Forced End) Retry Auto-Tune.
Failed (Inverter Protection) Check Motor S.F. Amps, Motor Voltage and Motor Hp settings
and retry Auto-Tune.
Failed (Current Limit) Check Motor Wiring.
Failed (75% Output Voltage) Check for a uctuation of the power supply voltage.
Failed (Motor Not Connected) Check the motor wiring. Check Motor S.F. Amps, Motor Voltage
and Motor Hp settings and retry Auto-Tune.
• Factory Reset
This will reset all user settings and VFD parameters to their factory default values. The user
must select “Confirm” when prompted “Are You Sure?” for the factory reset to be performed.

SJE Rhombus® 17 H2O Drive®Panel Operation Manual
TUNING & TROUBLESHOOTING GUIDE
• Testing & tuning the system:
To optimize the system, it is necessary to test run the pump and record the following
parameters: Pressure, Hz, & Amps. All are visible on the main screen of the display. Adjustments
can then be made to optimize the system performance.
• Pressure Overshoot:
Open multiple valves (faucets). Check to see if the pressure drops and the pump starts.
Ensure that the pump starts when pressure drops below the setpoint – differential.
As the pump starts and ramps up, leave the valves open and ensure the pressure increases
rapidly and reach the set pressure. Record the Amp reading when the pump is running at full
speed (60Hz). It is not uncommon for the pressure to overshoot the setpoint by 2~8 PSI. If the
overshoot is excessive (causing a high-pressure alarm), check the following (in order of
importance. Only go to the next step after completing the first one. Do not go to the next step
if the previous one fixes the problem. Do not change multiple parameters at the same time)
1) Check sizing and pre-charge of the pressure tank (Hydropneumatic tank)
2) Reduce the PID integral term. (From 1.0 to 0.8 sec)
3) Decrease the Max Frequency by 3Hz and try again
• Dry Run:
The pump will shut down when running at full speed (60Hz) and is not able to meet the set
pressure and has low amps. Record the Amp reading during normal pumping conditions and
set the “Dry Run Amps” at 20% under this value. If the well is low producing, it is possible to
set a Recharge timer. The Dry Run alarm will automatically reset at the end of the Recharge
timer and the pump will run again.
• Excessive cycling:
If the pump is cycling too often, check the following:
Sleep Frequency: Lower by 2Hz and try again.
• Not shutting off:
If the pump does not shut off when there is no flow (all valves closed), check the following:
Raise the Sleep Frequency 3Hz above the frequency observed when running at no flow.
Check sizing and pre-charge of the pressure tank (Hydropneumatic tank).

SJE Rhombus® 18 H2O Drive®Panel Operation Manual
ERROR MESSAGES
MAIN DISPLAY MESSAGE DESCRIPTION OF FAULT ALARM
SYSTEM FAULTS
HMI Communication Lost Loss of communications between VFD and display
Pressure Sensor Failure Pressure transducer fault (Analog input <3.7mA or
>20.7mA)
High Pressure Alarm Pressure > High Pressure Alarm setpoint
Low Pressure Alarm Pressure < Low Pressure Alarm setpoint
Floor Sensor Alarm Floor Sensor digital input is active, VFD is shut down.
Low Water Alarm Low Water digital input is active, VFD is shut down.
DRY RUN (Flashing) Pump Amps low / VFD full speed / pressure under
setpoint--Impending shut down (timer counting down)
DRY RUN Run Dry Fault (Auto-Reset timer counting down or
Manual Reset required).
VFD FAULTS
Over-current During Accel E. OC1 Overcurrent Trip During Acceleration *
Over-current (Const Speed) E. OC2 Overcurrent Trip During Constant Speed *
Over-current During Decel E. OC3 Overcurrent Trip During Deceleration *
Over-voltage 1 E. OV1 Regenerative Overvoltage
Over-voltage 2 E. OV2 Regenerative Overvoltage
Over-voltage 3 E. OV3 Regenerative Overvoltage Trip
VFD Overload Trip E. THT Inverter Overload Trip
Motor Overload Trip E. THM Motor Overload Trip
VFD Overheat E. FIN Overheat
Stall Prevention E. OLT Stall Prevention
Ground Fault E. GF Output Side Earth (ground)
Output Phase Loss E. LF Output Phase Loss
Inrush Current Limit E. IOH Inrush Current Limit Circuit
Invalid Analog Input E. AIE Analog Input Fault
VFD EEPROM Fault E. PE Parameter Storage Device Fault
Fault Retry Exceeded E. RET Retry Count Excess
VFD CPU Fault E. 5/E CPU fault
Output Amps Detection E. CDO Output Current Detection Value Exceeded
VFD CPU Fault E. CPU VFD CPU Fault
Input Phase Loss E. ILF Input Phase Loss
Brake Transistor Alarm E. BE Break Transistor Alarm Detection
External Thermal Overload E. OHT External Thermal Relay Operation
External Thermistor Trip E. PTC Thermistor Operation
Disconnected PU E. PUE PU Disconnection
Safety Circuit Fault E. SAF Safety Circuit Fault
* If an OC1, OC2, or OC3 fault occurs frequently, a motor Auto-Tune can often remedy this. The
Auto-Tune function can be found in the Advanced menu.