Section 2 – SR-2 Hardware Description
Interface Board LED Functions
The LED is illuminated when the associated circuit is
energized.
LED #
Function
LED3
K2 Preheat Circuit
LED4
K4 Damper Circuit
LED5
K3 High Speed Circuit
LED6
K1 Run Relay Circuit
LED7
K5 Diesel/Electric Relay
LED 8
Pilot Solenoid Circuit
LED 9
Liquid Line Solenoid Circuit
LED10
Hot Gas Bypass Valve Circuit
LED11
Spare Output 1 Circuit
LED17
Loader Valve 1
LED18
Loader Valve 2
LED19
Liquid Injection Valve Circuit
LED20 Water
Valve
LED21 Status – Flashes once per second
when the microprocessor is powered
and operating normally. Flashes
several time per second when flash
loading. Is on without flashing during
reboot and when under test.
LED22
K8 Electric Circuit
LED23
K9 On/Off Circuit
LED24
K6 Fuel Solenoid Pull-In Circuit
LED25
K7 Starter Circuit
LED26 Future
Use
Smart FET Outputs
A Smart FET is a self protecting output device used
for the functions shown in the table below. If an
overcurrent condition occurs, the Smart FET will turn
off until the overcurrent condition no longer exists. It
will then resume normal operation. A fuse is not
required.
Output Function
Run Relay Coil
High Speed Relay Coil
EVA, EVB, EVC, EVD
ETV Outputs
26 Pilot
Solenoid
HG
Hot Gas Solenoid
ALPC Alarm
Light
ALM Alarm
Light
LV1
Loader Valve 1
LV2
Loader Valve 2
WV Water
Valve
LQI
Liquid Injection Valve
LLS
Liquid Line Solenoid
GM1, GM2
Damper Gear Motor
1
Note 1 - Gear motor circuitry not present on all relay
boards.
2-13
31 January 2005
Summary of Contents for SR-2 SmartReefer2
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Page 7: ...Tab goes here and the next page should be GREEN Section 1 Safety...
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Page 15: ...Tab goes here and the next page should be GREEN Section 2 Hardware Description...
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Page 49: ...Tab goes here and the next 2 pages should be GREEN Section 3 Software Description...
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Page 97: ...Tab goes here and the next page should be GREEN Section 4 Operation...
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Page 267: ...Tab goes here and the next page should be GREEN Section 6 Service Procedures...
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