Grundfos RF2 User manual

GRUNDFOS INSTRUCTIONS
Redi-Flo Variable
Frequency Drive
USA Installation and operating instructions

SAFETY NOTICE
11
This equipment contains voltages that may e as great as 1000 volts! Electrical shock
can cause serious or fatal injury. Only qualified personnel should attempt the start–up
procedure or trou leshoot this equipment.
PPRREECCAAUUTTIIOONNSS::
WWAARRNNIINNGG::Do not touch any circuit oard, power device or electrical
connection efore you first ensure that power has een
disconnected and there is no high voltage present from this
equipment or other equipment to which it is connected. Electrical
shock can cause serious or fatal injury. Only qualified personnel
should attempt the start–up procedure or trou leshoot this equipment.
WWAARRNNIINNGG::Be sure the system is properly grounded efore applying power.
Do not apply AC power efore you ensure that grounds are
connected. Electrical shock can cause serious or fatal injury.
WWAARRNNIINNGG::Do not remove cover for at least five (5) minutes after AC power is
disconnected to allow capacitors to discharge. Electrical shock can
cause serious or fatal injury.
CCAAUUTTIIOONN::Disconnect motor leads (T1, T2 and T3) from control efore you
perform a “Megger” test on the motor. Failure to disconnect motor
from the control will result in extensive damage to the control. The
control is tested at the factory for high voltage / leakage resistance
as part of Underwriter La oratory requirements.
CCAAUUTTIIOONN::Do not connect AC power to the Motor terminals T1, T2 and T3.
Connecting AC power to these terminals may result in damage to
the control.

QUICK START GUIDE
21
QQUUIICCKK SSTTAARRTT GGUUIIDDEE
To operate the Redi-Flo VFD system, simply:
1. Su merge the RF2 or RF4 pump in the water to e pumped.
2. Connect the motor lead to the Redi-Flo VFD. (Note: With RF4 Varia le Performance
Pumps you must have an adapter cord to connect to Redi-Flo VFD.
##33 aanndd ##44 ffoorr ooppeerraattiioonn wwiitthh ggeenneerraattoorr oonnllyy..
WWAARRNNIINNGG:: DDoo nnoott lleett tthhee ggeenneerraattoorr rruunn oouutt ooff ggaass wwhhiillee ppoowweerriinngg tthhee VVFFDD..
IIff iitt ssuurrggeess aanndd ccrreeaatteess eexxcceessssiivvee vvoollttaaggee,, iinntteerrnnaall VVFFDD ddaammaaggee ccoouulldd rreessuulltt..
3. If using a generator, start the generator and allow it to warm up.
4. If the generator has a circuit reaker, close the reaker and check the output
voltage from the generator. The output voltage must e within the specified
ranges (refer to Technical Specifications, at the end of this manual) to ensure proper
operation and prevent damage to the system. If the voltage is too high or too low,
adjustments to the generator must e performed to allow the system to run.
5. Plug the Redi-Flo VFD into a generator or connect to utility power supply. The unit
accepts 115V or 230V sources. Refer to the Input Power Terminals section for wiring instructions.
WWAARRNNIINNGG:: IInnccoorrrreecctt wwiirriinngg oonn tthhee 111155VV oorr 223300VV tteerrmmiinnaallss wwiillll ddaammaaggee tthhee ddrriivvee..
6. The VFD will initialize and e ready to drive the motor. After the initialization screen
appears, the following will e displayed:
• STP means the drive is stopped
• V indicates motor volts
• REDIFL2 indicates Redi-Flo2 pump mode
• LOC means the drive is in Local Keypad Mode
• A indicates motor amps
• HZ indicates motor frequency
The VFD defaults to Redi-Flo2 operation. To change to Redi-Flo4 press the sequence SHIFT-▼-SHIFT keys.
Use sequence SHIFT-▲-SHIFT to return to Redi-Flo2.
7. Press the FWD key to start the motor and use the ▲and ▼ arrow keys to increase
or decrease speed. Continuous holding of the arrow key will increase the rate of speed
change. The STOP key is used to stop the motor.
8. Pressing the ENTER key allows the user to quickly set the speed to any given value
y using the ▲and ▼ arrows to change speed and the SHIFT key to cursor etween digits.
9. When powering down, unplug the Redi-Flo VFD from the generator BEFORE
removing the motor lead from the Redi-Flo VFD or turning off the generator.
NNoottee:: TToo pprreevveenntt ttrriippppiinngg ppoowweerr ssoouurrccee cciirrccuuiitt rreeaakkeerrss pplleeaassee oosseerrvvee tthhee ffoolllloowwiinngg:: WWhheenn uussiinngg tthhee RReeddii-FFlloo44
ppuummpp aanndd aa VVFFDD ppoowweerr ssoouurrccee ooff 111155VVAACC,, mmoottoorr ssppeeeeddss ooff ggrreeaatteerr tthhaann 7700HHzz mmaayy ddrraaww oovveerr 1155 aammppss.. FFoorr
223300VVAACC ppoowweerr ssoouurrccee mmoottoorr ssppeeeeddss ggrreeaatteerr tthhaann 9900 HHzz mmaayy ddrraaww oovveerr 1155 aammppss.. IInn RReeddiiFFlloo44 mmooddee,, 110000 HHzz
ccaannnnoott ee eexxcceeeeddeedd wwiitthhoouutt cchhaannggiinngg ppaarraammeetteerrss..
STP 0V REDIFL2
LOC 0.0A 0.00HZ

PRE-INSTALLATION CHECKLIST
13
CCoommppoonneennttss ooff YYoouurr RReeddii-FFlloo VVFFDD SSyysstteemm
Your Redi-Flo Varia le Performance Pump system should contain the following
components:
1. Redi-Flo Varia le Frequency Drive, (See Figure 1)
2. Either a Redi-Flo2® pump and motor with lead (Figure 2) or a Redi-Flo4™ Varia le
Performance pump, motor, lead, lead/plug and RF4 x VFD adapter cord (Figure 3).
Figure 1
Redi-Flo2®
Redi-Flo4®
Figure 2
Figure 3
TToo ooppeerraattee tthhee ssyysstteemm yyoouu wwiillll aallssoo nneeeedd::
1. A discharge hose or pipe to connect to the pump (See Figure 4).
2. An electrical plug to connect the Redi-Flo VFD power cord to your porta le
generator may e needed if the supplied plug is not compati le with your generator (See Figure 5).
3. Safety ca le and hardware for lowering and lifting the pump (See Figure 6).
Redi-Flo2®
Figure 6Figure 5
The exact type of plug used will depend
upon your generator, The Redi-Flo VFD
is supplied with a standard NEMA 5-15P,
115V, 3 prong plug.
Figure 4
Redi-Flo4®

ASSEMBLING THE REDI-FLO VFD SYSTEM
41
IINNPPUUTT PPOOWWEERR TTEERRMMIINNAALLSS
The input voltage can e changed etween 115V and 230V y changing the line input
connections as shown elow:
WWaarrnniinngg - IIff tthhee RReeddii-FFlloo VVFFDD iiss mmiisswwiirreedd ffoorr tthhee iinnccoommiinngg vvoollttaaggee,, iinntteerrnnaall ddaammaaggee
mmaayy ooccccuurr ttoo tthhee ddrriivvee..
AAttttaacchhiinngg tthhee PPuummpp ttoo tthhee ppiippee
When connecting the discharge pipe or tu ing to the pump, a ack-up wrench should e used. It is
recommended that a safety ca le e attached to the pump (using special rackets and ca les, sold separately)
anytime plastic pipe or flexi le tu ing is used (as shown if figure 6). A check valve may also e added to
Redi-Flo2® pumps to prevent fluid from flowing ack into the pump after it is turned off ( ackflow prevention).
A check valve is standard on Redi-Flo4™ pumps. Always check to ensure joints are fastened securely. The use of
a torque arrestor is not required when using the Redi-Flo VFD.
LLoowweerriinngg tthhee PPuummpp IInnttoo tthhee WWeellll
Make sure the electrical motor leads are not cut or damaged in any way when the pump is eing lowered into the
well. Do not use the motor leads to support the weight of the pump. To protect against surface water entering the
well and contaminating the well, the well should e finished off utilizing a locally approved well seal.
The motor lead should e secured to the discharge pipe or tu ing at frequent intervals to prevent sagging,
looping and possi le motor lead damage. Teflon® wire ties are recommended for environmental applications.
IIMMPPOORRTTAANNTT
Plastic pipe and tu ing tend to stretch under load. This stretching must e taken into account when securing the motor lead
to the riser pipe or tu ing. Leave three to four inches of slack etween clipped points. This tendency to stretch will also affect
the calculation of the pump setting depth. When plastic pipe or tu ing is used, it is recommended that a safety ca le e
attached to the pump to raise and lower it. Redi-Flo4™ pumps are designed to accommodate this ca le and Redi-Flo2®
pumps can e fitted with a safety ca le racket (part num er 1A0019).
223300VVAACC
111155VVAACC
RR22BBtt//RR11BB-TT11TT22TT33GGNNDD
-----230VAC-----
-----------115VAC-----------
HHoottNNeeuuttrraallGGrreeeenn

ASSEMBLING THE REDI-FLO VFD SYSTEM
15
OOPPEERRAATTIINNGG CCOONNDDIITTIIOONNSS
To ensure the Redi-Flo Varia le Performance Pumping system operates properly, follow these guidelines:
• The Redi-Flo2® or Redi-Flo4™ pump must e installed vertically with the discharge end pointed upwards.
• The electrical voltage supply to the Redi-Flo VFD must always e within + or - 10% of the specified power
supply ( 103.5 - 126.5 VAC at 115V connection or 207 - 253 VAC at 230V ).
• For est performance when operating on a generator, 115V generators should e set at 120V without load and
230V generators should e set at 240V without load. Use a separate meter to set voltage; do not rely on uilt-
in meters found on generators. Verify generator voltage stays within tolerance at full load.
• The pump and motor must always e completely su merged in fluid to ensure
lu rication and cooling of the motor.
• The temperature of the fluid eing pumped should e according to the technical
specifications shown in the motor specifications.
• The installation depth of the pump should always e at least three feet elow the maximum drawdown level
of the well.
• Redi-Flo pumps are not recommended for well development or pumping fluid
containing a rasives.
• Redi-Flo2® pumps are not recommended for continuous operation applications.
• The warranty of the Redi-Flo pumps will e void if other than the Redi-Flo VFD is used or if corrosive fluids are
pumped.
• The service life of dedicated Redi-Flo pumps may e compromised if the am ient water quality exceeds one or
more of the following values:
pH<5 DO>2 ppm H2S>1 ppm CL->500 ppm TDS>1000 ppm
AAddhheerreennccee TToo EEnnvviirroonnmmeennttaall RReegguullaattiioonnss
When handling and operating the Redi-Flo Varia le Performance Pump system, all environmental regulations
concerning the handling of hazardous materials must e o served. When the pump is taken out of operation,
great care should e taken to ensure that the pump contains no hazardous materials that might cause injury to
human health or to the environment.
PPuurrggiinngg AA WWeellll
If the pump is used to purge a well, start the pump at minimum speed and gradually increase to desired speed.
Redi-Flo products are not recommended for well development.
GGeenneerraattoorr UUssaaggee
MMiinniimmuumm ggeenneerraattoorr ssiizzee((RReeddii-FFlloo22//RReeddii-FFlloo44))
For generators with voltage regulation 2500/3400 watts at 115/230VAC, single phase
For generators without voltage regulation 5000/6700 watts at 115/230VAC, single phase
Recommended for optimal performance 4000/5400 watts at 115/230 VAC, single phase
with voltage regulation

REDI-FLO VFD SPECIAL FEATURES
61
DDuuaall IInnppuutt CCaappaaiilliittyy
Redi-Flo VFD can accept 115V or 230V single phase input voltage. Refer to the input power
terminal section on page 4 for connection instructions.
EEnncclloossuurree
The Redi-Flo VFD NEMA 4 enclosure is designed for outdoor duty and is resistant to
damage as a result of incidental exposure to rain.
UULL AApppprroovvaallss
The Redi-Flo VFD is UL Listed to U.S. and Canadian electrical safety standards.
DDuuaall FFuunnccttiioonnaalliittyy
The Redi-Flo VFD can change from operating Redi-Flo2® (MP1) to Redi-Flo4™
Varia le Performance pumps with a few keystrokes.
OOppttiimmiizzeedd VVoollttss//FFrreeqquueennccyy ((VV//HHZZ)) PPaatttteerrnn
The Redi-Flo VFD V/Hz pattern is specially optimized to allow the most efficient
operation of Redi-Flo2® and Redi-Flo4™ varia le performance pumps.

REDI-FLO VFD KEYPAD OVERVIEW
17
OOvveerrvviieeww
The keypad is used to program the control parameters, to operate the motor and to monitor the status
and outputs of the control y accessing the display options, diagnostic menus and the fault log.
IInnddiiccaattoorr LLiigghhttss
JOG - (Green) lights when Jog is active.
FWD - (Green) lights when FWD direction is commanded.
REV - (Green) lights when REV direction is commanded.
STOP - (Red) lights when motor STOP is commanded.
JJOOGG - Press JOG to select the
preprogrammed jog speed. After the
jog key has een pressed, use the FWD
or REV keys to run the motor in the
direction that is needed. The JOG key is
only active in the local mode.
FFWWDD - Press FWD to initiate forward
rotation of the motor. (Active in Local
and Jog modes).
RREEVV - Press REV to initiate reverse
rotation of the motor. (Active in Local
and Jog modes).
SSTTOOPP - Press STOP to initiate a stop
sequence. Depending on the setup of
the control, the motor will either regen
or coast to a stop. This key is
operational in all modes of operation
unless it has een disa led y the
Keypad Stop parameter in the Keypad
(programming) Setup Block.
LLOOCCAALL - Press LOCAL to change
etween the local (keypad) and remote
operation.
DDIISSPP - Press DISP to return to display
mode from programming mode.
Provides operational status and
advances to the next display menu
item.
SSHHIIFFTT - Press SHIFT in the program
mode to control cursor movement.
Pressing the SHIFT key once moves the
linking cursor one character position
to the right. While in program mode, a
parameter value may e reset to the
factory preset value y pressing the
SHIFT key until the arrow sym ols at
the far left of the keypad display are
flashing, then press an arrow key. In
the display mode the SHIFT key is used
to adjust the keypad contrast.
RREESSEETT - Press RESET to
clear all fault messages (in local mode).
Can also e used to return to the top of
the lock programming menu without
saving any parameter value changes.
PPRROOGG - Press PROG to enter the
program mode. While in the program
mode the PROG key is used to edit a
parameter setting.
▲((UUPP AArrrrooww))..
Press ▲to change the value of the
parameter eing displayed. Pressing ▲
increments the value to the next
greater value. Also, when the fault log
or parameter list is displayed, the ▲
key will scroll upward through the list.
In the local mode pressing the ▲key
will increase motor speed to the next
greater value.
EENNTTEERR - Press ENTER to save parameter
value changes and move ack to the
previous level in the programming
menu. In the display mode the ENTER
key is used to directly set the local
speed reference. It is also used to select
other operations when prompted y
the keypad display.
▼((DDoowwnn AArrrrooww))
Press ▼to change the value of the
parameter eing displayed. Pressing ▼
decrements the value to the next lesser
value. Also, when the fault log or
parameter list is displayed, the ▼key
will scroll downward through the list.
In the local mode pressing the ▼key
will decrease motor speed to the next
lesser value.
KKeeyyppaadd DDiissppllaayy - Displays status
information during Local or Remote
operation. It also displays information
during parameter setup and fault or
Diagnostic Information.
MMoottoorr SSeelleeccttiioonn - The VFD defaults to
Redi-Flo2 operation, to change to
Redi-Flo 4, press the key sequence
“Shift -▼- Shift.” Use the sequence
“Shift -▲- Shift” to return to Redi-Flo2.

MOTOR CONTROL VIA KEYPAD
81
The Redi-Flo VFD can operate the motor in three (3) different ways from the keypad.
1. Speed adjustment using the Keypad arrow keys
2. Speed adjustment with Keypad entered values
3. JOG Command
11)) KKeeyyppaadd aarrrrooww ssppeeeedd ccoonnttrrooll
Press FWD or REV to select desired direction of motor rotation, then press or hold the up arrow key ▲to increase
speed or use the down arrow key ▼to reduce motor speed. Continuously holding the arrow key will cause the
speed to change in larger increments. The minimum speed increment produced y the arrow keys is defined in
PROG/Keypad Setup/Keypad Speed INC. Default value of 0.10 Hz can e changed y the user.
22)) KKeeyyppaadd ssppeeeedd eenntteerreedd vvaalluuee
Press the ENTER key and use the ▲ and ▼ arrow keys to adjust digits and the SHIFT key to cursor to the desired
digit. Press ENTER when finished selecting desired motor speed to return to the display mode. Press the FWD or
REV key to run the motor in the desired direction at the programmed speed.
33)) JJOOGG CCoommmmaanndd
The JOG key can e used to ramp the pump up to a predetermined speed in the forward or reverse direction.
Press the JOG key then hold the FWD or REV key, and the pump will ramp to the speed set in PROG/Jog
Settings/Jog Speed. Acceleration and deceleration times for Jog can also e set in this programming menu.
DDIISSPP KKeeyy
The DISP key can e used for accessing diagnostic and trou leshooting screens as shown elow:
Action Description Display Comments
Apply Power Display mode showing mode,
voltage, current & frequency
status.
No faults present. Local keypad
mode. If in remote mode, press
local for this display.
Press DISP key Scroll to fault log block. Press ENTER to view the fault log
if desired.
Press DISP key Scroll to diagnostic info block. Press ENTER to view diagnostic
information if desired.
Press DISP key Scroll to local speed ref. block. Press ENTER to change motor
speed.
Press DISP key Display mode showing output
frequency.
Press DISP key Display mode showing motor
speed (based on output
frequency).
Press DISP key Display mode showing output
current.
Press DISP key Display mode showing output
voltage.
redifl2

MOTOR CONTROL VIA KEYPAD
19
AAddjjuussttiinngg DDiissppllaayy CCoonnttrraasstt
When AC power is applied to the VFD, the keypad should display the status of the
unit. If there is no display visi le, or if it is difficult to read, use the following procedure to adjust the display.
Contrast may e adjusted in the display mode when motor is stopped or running.
Action Description Display Comments
Apply Power No visible display
Press DISP Key Places control in display mode Display mode.
Press SHIFT key 2 times Allows display contrast
adjustment
Press Yor BKey Adjusts display intensity
Press ENTER Saves level of contrast and exits
to display mode

PROG MENU
101
LEVEL 1 BLOCKS LEVEL 2 BLOCKS
Preset Speeds Input Output Limits Brake Adjust
Preset Speed #1 Operating Mode Operating Zone Resistor Ohms
Preset Speed #2 Command Select Min Output Frequency Resistor Watts
Preset Speed #3 ANA CMD Inverse Max Output Frequency DC Brake Voltage
Preset Speed #4 ANA CMD Offset PK Current Limit DC Brake Frequency
Preset Speed #5 ANA CMD Gain REGEN Limit Brake on Stop
Preset Speed #6 CMD SEL Filter REGEN Limit ADJ Brake on Reverse
Preset Speed #7 Power Up Mode PWM Frequency Stop Brake Time
Preset Speed #8 Brake on Start
Preset Speed #9 Output Custom Units Start Brake Time
Preset Speed #10 Digital Out #1 MAX Decimal Places
Preset Speed #11 Digital Out #2 Value at Speed Process Control
Preset Speed #12 Digital Out #3 Value DEC Places Process Feedback
Preset Speed #13 Digital Out #4 Value Speed REF Process Inverse
Preset Speed #14 Zero SPD Set PT Units of Measure Setpoint Source
Preset Speed #15 At Speed Band Units of MEAS 2 Setpoint Command
Set Speed Point Set PT ADJ Limit
Accel / Decel Rate Analog Out #1 Protection At Setpoint Band
Accel Time #1 Analog Out #2 External Trip Process PROP Gain
Decel Time #1 Analog Scale #1 Local Enable INP Process INT Gain
S-Curve #1 Analog Scale #2 Process DIFF Gain
Accel Time #2 Underload Set Point Miscellaneous Follow I:O Ratio
Decel Time #2 Restart Auto/Man Follow I:O Out
S-Curve #2 V/HZ and Boost Restart Fault/Hr Encoder Lines
Ctrl Base Frequency Restart Delay Integrator Clamp
Jog Settings Torque Boost Factory Settings Minimum Speed
Jog Speed Dynamic Boost Language Select
Jog Accel Time Slip Comp Adj STABIL ADJ Limit Skip Frequency
Jog Decel Time V/HZ Profile Stability Gain Skip Frequency #1
Jog S-Curve V/HZ 3-PT Volts Skip Band #1
V/HZ 3-PT Frequency Security Control Skip Frequency #2
Keypad Setup Max Output Volts Security State Skip Band #2
Keypad Stop Key Access Timeout Skip Frequency #3
Keypad Stop Mode Access Code Skip Band #3
Keypad Run Fwd
Keypad Run Rev Motor Data Synchro Starts
Keypad Jog Fwd Motor Voltage Synchro Starts
Keypad Jog Rev Motor Rated Amps Sync Start Frequency
3 Speed Ramp Motor Rated Speed Sync Scan V/F
Switch on Fly Motor Rated Frequency Sync Setup Time
LOC. Hot Start Motor Mag Amps Sync Scan Time
Sync V/F Recover
Sync Direction
Communications
Protocol
Baud Rate
Drive Address
AAddvvaanncceedd PPrrooggrraammmmiinngg
A password is required for advanced programming features. AAlltteerriinngg ssoommee ddeeffaauulltt sseettttiinnggss ffoorr RReeddii-FFlloo22 oorr
RReeddii-FFlloo44 ccoouulldd ppoossssiillyy ddaammaaggee tthhee mmoottoorr oorr VVFFDD..For additional programming instructions, please refer to
the full programming guide found at the Baldor we site: www.Baldor.com The manual can e found under
Support — installation and operation manuals. It is Baldor manual num er MN715, Series 15H Inverter.

TROUBLESHOOTING GUIDE TO ERROR MESSAGES
111
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
Command Select Incorrect operating mode
programmed. Change Operating Mode in the Level 1 Input block to one that does not require the expansion board.
Need expansion board. Install the correct expansion board for selected operating mode.
Bus Overvoltage
Trip or
HW Overvoltage DECEL Rate set too low a value Lengthen DECEL time.
Add external dynamic braking resistors or module.
Input voltage too high. Verify proper AC line voltage.
Use step down transformer if needed.
Use line reactor to minimize spikes.
Bus Undervoltage Input voltage too low. Verify proper AC line voltage.
Use step up transformer if needed.
Check power line disturbances (sags caused by start up of
other equipment).
Monitor power line fluctuations with date and time imprint
to isolate power problem.
External Trip Motor draws excessive current. Check motor for overloading.
Verify proper sizing of control and motor.
External trip parameter incorrect. Verify connection of external trip circuit at J4-16.
Set external trip parameter to “OFF”if no connection made
at J4-16.
Hardware Protect Fault duration too short to be
identified. Reset control. Check for proper grounding of power wiring and shielding of signal wiring.
Replace control board.
Heatsink Temp Motor Overloaded. Correct motor loading.
Verify proper sizing of control and motor.
Ambient temperature too high. Relocate control to cooler operating area.
Add cooling fans or air conditioner to control cabinet.
Built-in fans are ineffective or
inoperative. Verify fan operation. Remove debris from fan and heatsink surfaces.
Replace fan or check fan wiring.

TROUBLE SHOOTING GUIDE (CONT.)
121
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
HW Desaturation Accel/Decel rate set too short.
Torque Boost set too high.
Electrical noise in logic circuits.
Motor overloaded.
Lengthen Accel/Decel rate.
Reduce torque boost value.
Check for proper grounding of power wiring and shielding of signal wiring.
Verify proper sizing of control and motor or reduce motor load.
HW Power
Supply Power supply malfunctioned. Check internal connections. Replace logic power board.
HW Ground Fault Output current (motor current)
leakage to ground. Disconnect wiring between control and motor. Retry test. If GND FLT is cleared, reconnect motor leads and retry the test. Repair
motor if internally shorted.
Replace motor lead wire with low capacitance cable.
If GND FLT remains, contact your dealer.
Motor Will Not
Start Motor overloaded. Check for proper motor loading.
Check couplings for binding.
Verify proper sizing of control and motor.
Motor may be commanded to run
below minimum frequency setting. Increase speed command or lower minimum frequency setting.
Incorrect Command Select
parameter. Change Command Select parameter to match wiring at J4.
Incorrect frequency command. Verify control is receiving proper command signal at J4.
Motor Will Not Max Frequency Limit set too low. Adjust Max Frequency Limit parameter value.
Reach Maximum
Speed Motor overloaded. Check for mechanical overload. If unloaded motor shaft does not rotate
freely, check motor bearings.
Improper speed command. Verify control is receiving proper command signal at input terminals.
Verify control is set to proper operating mode to receive your speed
command.
Motor Will Not
Stop Rotation MIN Output Speed parameter set too high. Adjust MIN Output Speed parameter value.
Improper speed command. Verify control is receiving proper command signal at input terminals.
Verify control is set to receive your speed command.
Motor runs rough Torque boost set too high. Adjust torque boost parameter value.
at low speed Misalignment of coupling. Check motor/load coupling alignment.
Faulty motor. Replace with a new motor.

TROUBLE SHOOTING GUIDE (CONT.)
113
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
New Base ID Replaced Control or circuit board. Restore parameters to factory settings.
Reset control.
No Display Lack of input voltage. Check input power for proper voltage.
Loose connections. Check input power termination.
Verify connection of operator keypad.
Adjust display contrast. See Adjust Display Contrast.
NV Memory Fail Memory fault occurred. Press “RESET”key on keypad. Restore parameter values to factory
settings. If fault remains, call dealer.
3 Sec Overload Peak output current exceeded 3 sec
rating. Check PK Current Limit parameter in the Level 2 Output Limits block.
Check motor for overloading.
Increase ACCEL time.
Reduce motor load.
Verify proper sizing of control and motor.
1 Min Overload Peak output current exceeded 1
minute rating. Check PK Current Limit parameter in the Level 2 Output Limits block.
Check motor for overloading.
Increase ACCEL/DECEL times.
Reduce motor load.
Verify proper sizing of control and motor.
Over Speed Motor exceeded 110% of MAX
Output Freq parameter value. Check Max Output Freq in the Level 2 Output Limits block.
Param Checksum Memory fault occurred. Press “RESET”key on keypad. Restore parameter values to factory
settings. If fault remains, call dealer.
Unknown Fault
Code Microprocessor detected a fault that is not defined in the fault code table. Press “RESET”key on keypad. Restore parameter values to factory settings. If fault remains, call dealer.
Unstable Speed Oscillating load.
Unstable input power.
Slip compensation too high.
Correct motor load.
Correct input power.
Adjust slip compensation.
uP Reset A software watchdog timer has
reset the processor because a
process has timed out.
Press “RESET”key on keypad. If fault remains, call dealer.
FLT Log MEM
Fail Corrupt data in fault log (may occur on older systems only). Press “RESET”key on keypad. If fault remains, call dealer.
Current SENS
FLT Failure to sense phase current. Press “RESET”key on keypad. If fault remains, call dealer.
Bus Current
SENS Failure to sense bus current. Press “RESET”key on keypad. If fault remains, call dealer.

HOW TO ACCESS DIAGNOSTIC INFORMATION
141
Action Description Display Comments
Apply Power Logo display for 5 seconds.
Display mode showing Local
mode voltage, current &
frequency status.
No faults present. Local keypad
mode. If in remote/serial mode,
press local for this display.
Press DISP key Scroll to fault log block. Press ENTER to view the fault log
if desired.
Press DISP key Scroll to diagnostic info block. Press ENTER to view diagnostic
information if desired.
Press ENTER key Access diagnostic information. .
Press DISP key Display mode showing control
temperature. 25.0 Displays operating temperature in degrees C.
Press DISP key Display mode showing bus
voltage.
Press DISP key Display mode showing bus
Current.
Press DISP key Display mode showing PWM
Frequency. 2497
Press DISP key Display mode showing %
overload current remaining.
Press DISP key Display mode showing real time
opto inputs & outputs states.
(0=Open, 1=Closed)
Opto Inputs states (Left);
Opto Outputs states (Right).
Press DISP key Display mode showing actual
drive running time since the Fault
log was cleared.
HR.MIN.SEC format.
Press DISP key Display operating zone with rated
hp and input voltage (for the
operating zone) and control type.
Press DISP key Display mode showing continuous
amps; PK amps rating; amps/volt
scale of feedback, power base ID.
Press DISP key Display mode showing which
Group1 or 2 expansion boards
are installed.
Press DISP key Display mode showing software
version and revision installed in
the control.
Press DISP key Displays exit choice. Press
ENTER to exit. Press ENTER to exit diagnostic information.
redifl2

HOW TO ACCESS THE FAULT LOG
115
Action Description Display Comments
Apply Power Logo display for 5 seconds.
Display mode showing Local
mode voltage, current &
frequency status.
No faults present. Local keypad
mode. If in remote/serial mode,
press local for this display.
Press DISP key Press DISP to scroll to the Fault
Log entry point.
Press ENTER key Display first fault type and time
fault occurred. Typical display.
Press Ykey Scroll through fault messages. If no messages, the fault log exit
choice is displayed.
Press RESET key Return to display mode. Display mode stop key LED is on.
How to Clear the Fault Log Use the following procedure to clear the fault log.
Action Description Display Comments
Apply Power Logo display for 5 seconds.
Display mode showing Local
mode voltage, current &
frequency status.
Display mode.
Press DISP key Press DISP to scroll to the Fault
Log entry point.
Press ENTER key Displays most recent message.
Press SHIFT key
Press RESET key
Press SHIFT key
Press ENTER key Fault log is cleared. No faults in fault log.
Press Yor Bkey Scroll Fault Log Exit.
Press ENTER key Return to display mode.
When a fault condition occurs, motor operation stops and a fault code is displayed on the Keypad display.
The control keeps a log of the last 31 faults. If more than 31 faults have occurred, the oldest fault will e deleted
from the fault log. To access the fault log, perform the following procedure:
redifl2
redifl2

FAULT MESSAGES
161
FAULT MESSAGE DESCRIPTION
Invalid Base ID Failure to determine control horsepower and input voltage configuration from the Power
Base ID value in software.
NV Memory Fail Failure to read or write to non-volatile memory.
Param Checksum Parameter Checksum error detected.
Low INIT Bus V Low bus voltage detected on startup.
HW Desaturation High output current condition detected (greater than 400% of rated output current). On B2
size controls, a desat error can indicate any of the following: low line impedance, brake
transistor failure or internal output transistor overtemperature.
HW Surge Current High output current condition detected (greater than 250% of rated output current).
HW Ground Fault Ground Fault detected (output current leakage to ground).
HW Power Supply Control Board power supply failure detected.
Hardware Protect A general hardware fault was detected but cannot be isolated.
1 MIN Overload Peak output current exceeded the 1 minute rating value.
3 SEC Overload Peak output current exceeded the 3 second rating value.
Overcurrent Continuous current limit exceeded.
BUS Overvoltage High DC Bus voltage.
Bus Undervoltage Low DC Bus voltage condition detected.
Heat Sink Temp Control heatsink exceeded upper temperature limit. For size B2 controls, this fault may
indicate the main heatsink or the gate drive circuit board is too hot.
External Trip Connection between J4-16 and J4-17 is open.
New Base ID Control board detected a change in the Power Base ID value in software.
REGEN RES Power Excessive power dissipation required by Dynamic Brake Hardware.
Line REGEN Fault in Line REGEN converter unit - Series 21H Line REGEN Inverter control.
EXB Selection Expansion board not installed to support the selected Level 1 Input Block, Command
Select parameter.
Torque Proving Unbalanced current in the three phase motor leads.
Unknown FLT Code Microprocessor detected a fault that is not identified in the fault code table.
µP RESET A software watchdog timer has reset the processor because a process has timed out.
FLT Log MEM Fail Corrupt data in fault log (may occur on older systems only).
Current SENS FLT Failure to sense phase current.
Bus Current SENS Failure to sense bus current.

TECHNICAL SPECIFICATIONS
117
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1 X 115V +/- 10% or 1 X 230V +/- 10%
Input Voltage Single Phase Input
Output Voltage 3 X 220V 3 X 230V
Continuous Output Current (230V input 6.05A 8.25A
Continuous Output Current (115V input 6.05A 6.50A
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Control System PWM
Output Voltage Clamp @ 220V Clamp @ 230V
Carrier Freq. Selectable: 1-5 KHz
Freq. Resolution 0.1Hz*
Input Freq. Range 48 – 62 Hz
Maximum Output Frequency(230V input 400 Hz 100 Hz
Maximum Output Frequency(115V input 400 Hz 80 Hz
Base Frequency 400 Hz 100 Hz
Torque Boost 0 – 15% Nominal Voltage
V/F Pattern Selectable Linear/Square Law
Accel Time 0.5 – 3600 Seconds
Decel Time 0.5 – 3600 seconds
Accel/Decel Pattern Linear
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Ground Fault Ground Fault detection for Equipment Protection
Overcurrent Output Short Circuit
Locked Rotor
Over Voltage 400VDC
Under Voltage 200VDC
Motor Overload I2 x T Characteristic
Line Start Lock Out VFD will not start upon input power application
Line Transient Rating
860 VAV, 810J MOV Between any power
input terminal & Ground
360 VAC, 380 J MOV Between any two
power input terminals
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Operating Temp. -10 to 40 degree C
Storage Temp. -30 to 65 degree C
Vibration 0.5G, Max / 57-150 Hz
Elevation 3300 ft. without derating
Max source fault current 5 Kamps
Enclosure rating UL Type 4, No Direct Sunlight

WARRANTY SERVICE
119
The Redi-Flo VFD is covered y the original equipment manufacturers
warranty for a period of 24 months. To o tain warranty services, contact the
distri utor or dealer from which it was purchased to o tain instructions.
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SSEERRVVIICCEE PPAARRTTSS
Only four repair parts are availa le, the carrying case, the keypad, power cord
and Harting motor connection. Contact the dealer from which the unit was
purchased for these parts.

Being responsi le is our foundation
Thinking ahead makes it possi le
Innovation is the essence
L-RF-IO-009 Rev. 06/02
Printed in the U.S.A.
North American Regional Headquarters
Grundfos Pumps Corporation
17100 W. 118th Terrace
Olathe, KS 66061
Telephone [phone]
Fax: [phone]
www.grundfos.com
Grundfos Canada, Inc.
2941 Brighton Road
Oakville, Ontario L6H 6C9, Canada
Telephone: [phone]
Fax: [phone]
Bombas Grundfos de Mexico, .A. de C.V.
Boulevard TLC #15
Parque Stiva Aeropuerto
Apodaca, N.L. Mexico
C.P. 66600
Telephone: [phone]
Fax: [phone]