151
CYCLE-SENTRY Diagnosis
Condition
Possible Cause
Test Procedure
Unit will not energize the run
relay when required
Defective run relay
Test run relay
Open 7A circuit from selector switch
to run relay
Test 7A circuit
Defective selector switch
Test circuit from 7M to 7A on switch
in the start-stop function
Defective load temperature
thermostat
Check load temperature thermostat
in Continuous Run mode
Open D7 or D8 diodes
Test D7 and D8 diodes
Defective CYCLE-SENTRY IV
module
Test CYCLE-SENTRY module
Open 53 circuit from run relay to
CYCLE-SENTRY module
Test 53 circuit
Preheat relay will not energize
when required
Defective preheat relay
Test preheat relay
Open 52A circuit from preheat relay
to CYCLE-SENTRY module
Test 52A circuit
Open D7 or D8 diodes
Test D7 or D8 diodes
Defective CYCLE-SENTRY module
Test CYCLE-SENTRY module
Open CH circuit to
CYCLE-SENTRY module
Test CH circuit
Open 7A circuit from selector switch
to the preheat relay
Test 7A circuit
Open 2A circuit to preheat relay
(after 9-89)
Test 2A circuit
Unit will not automatically crank,
but will preheat automatically
Defective CYCLE-SENTRY module
Test CYCLE-SENTRY module
Open 52 circuit from start relay to
starter
Test 52 circuit
Open 8S circuit from start relay to
starter
Test 8S circuit
Defective start relay
Test start relay
Defective starter
Test starter
Unit will not automatically crank,
but will preheat automatically
(continued)
Open 8 circuit to starter relay (after
9-89)
Test 8 circuit
Open 7A circuit to starter relay
Test 7A circuit
Unit disengaged starter before
engine is running
Defective CYCLE-SENTRY module
Test CYCLE-SENTRY module
Low battery condition
Test battery under load
Defective starter
Test starter in Continuous Run
mode
Summary of Contents for 914970
Page 3: ...3...
Page 10: ...Table of Contents 10...
Page 40: ...Operating Instructions 40...
Page 82: ...Electronic Controls 82...
Page 92: ...Electrical Maintenance 92...
Page 124: ...Refrigeration Maintenance 124...
Page 140: ...Hilliard Clutch Maintenance 140...
Page 160: ...Refrigeration Diagrams 160...
Page 163: ...Index 163 W wiring 85 wiring diagrams 165...
Page 164: ...Index 164...
Page 166: ...Wiring and Schematic Diagrams Index 166...
Page 167: ...167 Cab Control RD Wiring Diagram...
Page 168: ...168 RD w o Thermostat Cab Control Schematic...
Page 169: ...169 RD Cab Box Wiring Diagram...
Page 170: ...170 RD Cab Control w Thermostat Schematic Diagram...
Page 171: ...171 RD 50 STD 3 Phase Wiring Diagram Page 1 of 2...
Page 172: ...172 RD 50 STD 3 Phase Wiring Diagram Page 2 of 2...
Page 173: ...173 RD 50 STD 3 Phase Schematic Diagram Page 1 of 2...
Page 174: ...174 RD 50 STD 3 Phase Schematic Diagram Page 2 of 2...
Page 175: ...175 RD 30 STD Wiring Diagram Page 1 of 2...
Page 176: ...176 RD 30 STD Wiring Diagram Page 2 of 2...
Page 177: ...177 RD 30 STD Schematic Diagram Page 1 of 2...
Page 178: ...178 RD 30 STD Schematic Diagram Page 2 of 2...
Page 179: ...179 RD 30 C S Wiring Diagram Page 1 of 2...
Page 180: ...180 RD 30 C S Wiring Diagram Page 2 of 2...
Page 181: ...181 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 182: ...182 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...
Page 183: ...183 RD 50 C S 3 Phase Wiring Diagram Page 1 of 2...
Page 184: ...184 RD 50 C S 3 Phase Wiring Diagram Page 2 of 2...
Page 185: ...185 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 186: ...186 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...