Carrier 69UG15 Powerline Generator Sets Instruction Manual
- September 7, 2024
- Carrier
Table of Contents
Carrier 69UG15 Powerline Generator Sets
ARSALAN PST COMPLT
Important Information
Similar to the RG CARB (California Air Resources Board) model, reviewed in TL002 – 2023, Carrier released a UG genset model, 69UG15- 068S-24, that also meets the Carb emissions regulations for engines in the 8-19KW class.
Following is a review of the changes to the UG model along with a basic review on the operation (same as RG).
The emissions requirement is achieved by using an engine control unit (ECU) for precise metering and delivery of fuel into the combustion chamber, a high- pressure Common Rail System (CRS) for better atomization via fuel injectors, and a Diesel Oxidation Catalyst (DOC) to convert carbon monoxide and particulates into carbon dioxide and water, similar to the CARB compliant RG genset.
The ECU (1) controls the metering of fuel by activating fuel injectors (2) and
adjusting the suction control valve (SCV) (3) on the high-pressure fuel pump
to change the pressure in the CRS. The ECU monitors the pressure with the rail
pressure sensor (RPS) (4) and controls it to 10,200-10,800 psi (70-75 MPa) at
1500 RPM, no load. In the event the rail pressure approaches its limit, the
pressure limiter (PL) opens and releases fuel back to the tank. The PL is
located on the other side of the RPS on the CRS. The fuel is injected three
times per cycle: Pre injection uses a small amount of fuel to lower Nitrogen
oxides and noise; Main injection uses a higher volume of fuel for combustion;
and After injection is used to burn off unburned fuel.
The unit has different control box components compared to previous Carrier UG gensets. New to the genset is an Engine relay (ENGR), Starter Solenoid relay (SSR), Fuel Pump relay (FPR), Glow Plug relay (GPR), and Service Light.
The ENGR closes when the genset is put in the “RUN” position. It provides
power to the ECU and connected sensors, the gauge cluster on the control box
cover, and the integrated fuel heater. The SSR closes when the run switch is
pushed into the “Start” position. The SSR provides power to the starter
solenoid to start the engine. The FPR closes when the low oil pressure switch
(LOP) (9) closes, after which it powers the fuel pump. The GPR activates if
the ECU detects the coolant temperature to be at or below 20°C (68°F) and runs
for a set time based on the coolant temperature.
When starting the unit, refer to the label on the front of the unit to determine the amount of glow plug time prior to starting the unit, an example label is provided at the end of the TechLINE. The Service Light is connected to the ECU and will glow whenever the ECU detects an error. The light can be diagnosed via the Kubota Diagmaster Software. The Diagmaster software allows a user to read diagnostic codes, monitor engine data from sensors, and register new injectors. More information regarding installation and use of Diagmaster can be found in the operations and service manual (T-382).
Additional sensors on the engine include a crankshaft position sensor (aka Ne
sensor in Diagmaster) (5), camshaft position sensor (aka G sensor in
Diagmaster) (6), and coolant temperature sensor (7). The crankshaft position
sensor detects the angular position of the crankshaft which the ECU uses to
calculate the piston position and RPM of the engine. It is located behind the
starter motor. The camshaft position sensor detects the angular position of
the camshaft which the ECU also uses to calculate piston position. It is
located below the SCV connection. The coolant temperature sensor detects the
coolant temperature and sends it to the ECU. It is located near the radiator
cap.
The ECU also tracks the atmospheric pressure (8), battery voltage, run/stop switch position, and final fuel injection quantity. These values can be seen via Diagmaster and recorded with the data monitor.
- Engine Control Unit (ECU)
- Fuel Injectors
- Suction Control Valve (SCV)
- Rail Pressure Sensor (RPS)
- Crankshaft Position Sensor (Ne sensor)
- Camshaft Position Sensor (G sensor)
- Coolant Temperature Sensor
- Atmospheric Pressure Sensor
- Low Oil Pressure Switch (LOP)
Fuel System Diagram
- Fuel Tank
- Fuel Tank Shutoff Valve
- Pre-Filter Pump
- Fuel Filter / water Separator
- Feed Pump
- High Pressure Supply Pump
- Suction Control Vale (SCV)
- Rail Assembly
- Rail Pressure Sensor (RPS)
- Pressure Limiter (PL)
- Fuel Injector 1
- Fuel Injector 2
- Fuel Injector 3
- Fuel Injector 4
- Check Valve
- Engine Control Unit (ECU)
Startup Instructions:
Engine Data:
| Model | V2403-CR-E4B-CTD-4 |
|---|---|
| Fuel | Conventional Ultra Low Sulfur Diesel (ULSD) or ULSD B5 (5% bio |
component)
Coolant| 6 quarts of 50/50 Ethylene Glycol/Water mix
Lubrication| Sump Vol. 15 quarts; API CK-4 or better 0 to 45°F (-18° to 7°C):
SAE: 5W30 above 45°F (7°C): SAE: 10W30 or 15W40
Starting Support| Glow plug in combustion chamber Glow plug amperage:
Approximately 12 amps at 12 VDC Glow plug resistance (cold): Approximately 1
ohm
Recommended Service Stocking PNs:
- Oil Pressure Switch: 12-00592-16
- Fuel Filter Element: 30-00579-50
- Poly V-Belt: 50-01198-00
- Oil Pressure Sender: 66-U—1–2823-4
- Thermostat Assembly: 25-36203-00
- Oil Pump Assembly: 25-37040-00
- Sensor, Crank Angle: 25-39934-00
- Sensor, Camshaft Angle: 25-39920-00
- Sensor, Coolant Temp: 25-39921-00
- Diagnostic Tool: 07-60198-00
Carb Unit QR Links:
Ops and Service Manual (T-382)| Service Parts List (T-382PL)| Engine Service
Parts List (62-12242)
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Customer Support
Service Engineering / Container Products
Please circulate copies of this bulletin to all service and management
personnel as soon as possible