Coolant Temperature Sensor Service Kits; Introduction; Items Needed For Software Upgrade - Kohler Decision-Maker 1 Manual

Refer
Status Event to
or Fault
Menu
Voltage Lower
(see D18)
Voltage Raise
(see D19)
Weak Battery 10
* All models, except Waukesha-powered models.
[ Non-paralleling applications
] Waukesha-powered models
w Paralleling applications
5.4 Coolant Temperature Sensor
Service Kits
GM31990 and GM31991
(20- -2000 kW with Controllers and
Non-ECM Engines)
Adapted from Service Bulletin SB-643.
5.4.1

Introduction

Replacing the coolant temperature sensor on a
generator set with a controller and a non-ECM engine
requires controller application software version 2.21 or
higher.
The new sensor offers greater reliability with a different
sensing range requiring the software upgrade. See
Figure 5-9 for the coolant
illustration and Figure 5-10 for coolant temperature
sensor identification.
Note: If controller application software version 2.21 or
higher is loaded for any reason and the coolant
temperature sensor is NOT replaced, the user
must change the temperature sensor selection in
Menu 20, Factory Setup. Failure to change the
temperature sensor selection will cause the
controller to sense a higher than actual coolant
temperature and may cause nuisance high
coolant temperature shutdown faults.
Sensor Service Sensor P/N
Kit Part Number (shown in Menu 20)
— GM16787*
— GM17362[
GM31990 GM31045-1
GM31991 GM31045-2
* Replace GM16787 with GM31045-1.
[ Replace GM17362 with GM31045-2 and discard metric reducer bushing.
] Long sensor tip, 41.2 mm (1.62 in.). Required with metric reducing bushing.
Figure 5-10 Coolant Temperature Sensors Identification
TP-6356 4/12
Relay
Driver
Output
(RDO)
Digital Display
WEAK
BATTERY
temperature sensor
Sensor
Thread
1/2-14 NPT
1/2-14 NPT]
1/2-14 NPT
M18-1.50
Default
Selection
Range Setting
60% of
nominal
** NFPA applications
[[ DDC/MTU engine with MDEC/ADEC
]] FAA only
Sensor
Markings
Figure 5-9 Coolant Temperature Sensor and
Reducer Bushing (if equipped), Typical
Note: Failure to upgrade to the new software, after
changing the coolant temperature sensor, will
cause the controller to sense a lower than actual
coolant temperature. These lower temperature
readings may prevent a fault shutdown during an
actual high coolant temperature condition.
5.4.2 Items Needed for Software
Upgrade
The following items are needed to complete the
software upgrade. In order to expedite the upgrade
process, it is recommended to download the files on
your PC before installing the kit. Use program loader
and access TechTools to download the files.
D
Generator Set Operation Manual and Engine
Operation Manual
D
Personal Computer
(see Program Loader for requirements)
D
Null modem RS-232 cable with a 9-pin male plug
on the controller end
D
Program Loader Software
D
Application Code Software
Sensor Sensor Manufacturer
Version and Markings on Hex
Old Kavilco 3.2--4.4 HIGH
Old Kavilco 3.2--4.4 HIGH
New Airpax 5024--0443
New Airpax 5024--0468
Section 5 Decision-Makerr 550 Controller
Inhibit
Time Time
Delay User-Defined
Delay
Settings
(sec.) (sec.)
—
—
2
Sensor
Voltage Range
0.5--4.5
0.5--4.5
0.2--1.5
0.2--1.5
GM16787
91