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TK 61552-2-MM-EN
41
LED Functions
The LED is illuminated when the associated circuit output is energized. Not all output LEDs
shown are used on single temperature trailer applications.
LED #
Function
LED #
Function
LED 3
K2 Preheat
LED 19
Liquid Injection Valve (Not Used)
LED 4
K4 Damper Solenoid
LED 20
Loader Valve 3 (Not Used)
LED 5
K3 High Speed Solenoid
LED 21
Heartbeat (Note 1)
LED 6
K1 Run Relay
LED 22
K8 Auto Fresh Air Solenoid (Optional)
LED 7
K5 Diesel/Electric Relay
LED 23
K9 On/Off Relay
LED 8
Pilot Solenoid or Condenser Inlet Solenoid
LED 24
K6 Fuel Solenoid Pull-In
LED 9
Receiver Tank Pressure Solenoid/Liquid Line
Solenoid
LED 25
K7 Starter Relay
LED 10
Hot Gas Bypass/Loader Valve 2
LED 27
ETV-D (Note 2)
LED 11
Purge Valve (Not Used)
LED 28
ETV-B (Note 2)
LED 17
Loader Valve 1 (Not Used)
LED 29
ETV-A (Note 2)
LED 18
Alternator Excite
LED 30
ETV-C (Note 2)
Notes:
1.
The Status LED flashes once per second when the Base Controller is powered and operating normally.
The Status LED flashes several times per second during a flash load. The Status LED is on without
flashing during reboot and when the Base Controller is under test. The Status LED flashes twice within
one second followed by one second off if a CAN communication error is present.
2.
ETV LEDs are illuminated when the respective ETV output is energized. On applications without ETV,
the LEDs may be illuminated.
Smart FET Outputs
A Smart FET is a self protecting output device used for the functions shown in the table. Smart
FETs halt current flow if an over-current condition exists and generate an alarm. The Smart FET
will resume normal operation when the alarm is cleared and current flow is within limits. Smart
FETs are not field repairable. A fuse is not required.
Output
Function
EVA, EVB, EVC, EVD
ETV Outputs
26/PS
Pilot Solenoid
HG/HGS
Hot Gas/Hot Gas Bypass Solenoid
LV1
Not Used
LV3
Not Used
EXC
Alternator Excitation
LQI
Liquid Injection Valve
LLS
Not Used
GM1, GM2
Damper Gear Motor (See Note)
CIS
Not Used
RTPS
Not Used
PV
Not Used
Note:
Gear motor circuitry not present on all Base
Controllers.