38 Electronic Bypass Controller Installation and Commissioning Guide
7.5 Startup for Cooling Tower - Fan and/or Pump Applications
Task Parameter # Menu “0”
Parameter #
Fan
Settings
Pump
Settings
Action Parameter Notes
Minimum Speed 1.007 0.01 15Hz 30-45Hz Press M For Marley Towers with Gear-
reducer, you can set this at 0Hz.
Otherwise, fan may run at 15 Hz
if no sleep/wake mode, or run
signal interruption occurs. Pump
Min Speed will be dependent on
Pump Manufacturer. Check with
equipment manufacturer when
in doubt
Accel Rate 2.011 0.012 100-300 16.7 Press M Fan Accel is dependent on
HP and load. Cooling Tower
recommended to be 120
Decel Rate 2.021 0.013 100-500 16.7 Press M Fan Decel is dependent on HP
and load. Too low of a Decel
Rate can result in a “DC Bus
Overvoltage” trip on large fans.
Cooling Tower recommended
to be 120
Volt Mode Select 5.014 0.014 Fixed Fixed Press M Use Sre if OV faults persist after
adjusting Decel rate
Low Frequency
Voltage Boost
5.015 0.016 0.5 0.5 Press M
Dynamic V/F Flux
optimize
5.012 0.015 On On Press M
Insert Motor RPM 5.008 0.019 Motor
RPM
Motor
RPM
Press M Read Motor Name plate (ie.
1755?) - Put in Sync Speed
Insert Motor FLA 5.007 0.02 Motor FLA Motor FLA Press M Read Motor Name Plate Amps
Maximum Switching
Frequency
5.006 0.021 Only raise if there is an audible
noise issue
Catch a spinning
motor
6.009 0.023 1 1 Press M Detects Positive and Negative
Frequencies
T7 Analog input 2 7.011 0.027 20-Apr 20-Apr Press M Factory default is 4-20 ma. If 0 -
10 VDC, change default
Change Security
Status
11.044 0.031 L2 L2 PressOff/
reset
This allows access to advanced
Menu Parameters
Save parameters to
Smart Card
11.042 0.033 Prog Prog
Set Date 6.016 0.034 mm/dd/yy mm/dd/yy Press M
Set Time 6.017 0.035 HH.MM HH.MM Press M This is in Military Time
Set Date & Time 6.019 0.037 Set Set Press M Allows inputting of Date & Time
Turn off Set Date &
Time set ability
0.037 Local
Menu
Local
Menu
Press M This makes 0.034 & 0.035 “read
only”
Set Auto Reset
after trip
10.034 0.048 5 5 Number of attempts
Set Auto Reset delay
to 10 seconds
10.035 0.049 10 10 Time delay between attempts
Controller Gain - Kp 4.013 50 50
Controller Gain - Ki 4.014 5 5
Thermal Protection
Mode
4.016 On Off
(Default)
Speed Fold-back on Current
Limit
Full Power Breaking
Time
10.03 0 0 To disable It.Br fault
Full Power Breaking
Period
10.031 0 0
Save Advanced
Menu Parameters
10 1000 1000
Saves Parameters to
Secure Location on
SmartCard
10 3100 3100 Can extract Parameters by
setting 6100 in Pr XX.00
Maintenance:
Read last 10 faults 10.020-10.029 0.050 - 0.059 Most recent trip is P0.050
Date & Time Stamp
for last 10 faults
10.041-10.060 0.60 - 0.79 Most recent date/time stamp is
P0.060 & P0.061
Menu “0” Parameters for use with HVAC Drive H300 only.
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