TK 56433-5-MM-EN
29
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ntt:: If fuse F10 is installed in the left position
and the unit is turned off using the Off key,
the unit will shut down but the Base
Controller will remain powered up. Leaving
the unit turned off in this manner for an
extended period may result in a dead
battery.
Fuse F15
The device identified as F15 is a poly switch. This over-
current device resets automatically and is not
replaceable.
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.
SMART REEFER 3 (SR-3)
Microprocessor Controller
Refer to the SR-3 Trailer Single Temperature SL-400e,
SLX/SLXe/SLXi Series Diagnostic Manual TK 56487 for
complete service information about the
Microprocessor Controller and related components.
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ntt:: A ServiceWatch download can be helpful
when diagnosing a problem in a unit with
an SR-3 Controller. Therefore, it is
recommended that a ServiceWatch
download be preformed to help diagnose a
problem. A ServiceWatch download must
be preformed before contacting the
Thermo King Service Department for
assistance in diagnosing a problem. Refer
to the SR-3 Trailer Single Temperature SL-
400e, SLX/SLXe/SLXi Series Diagnostic
Manual TK 56487 for information about
downloading the ServiceWatch Data
Logger and viewing the data.
Fuse Link
The fuse link is located in the positive battery cable.
The fuse link protects the electric system from a short
in the 2 circuit. If the fuse link burns out, check for a
