Hussmann super plus Service Manual

Overview ....................................................4-1
Field Wiring ...............................................4-1
Wiring Guidelines Based on

Various Components ............................4-2

Using Schematics .......................................4-3
Alarm Board...............................................4-3
Compressor Controls..................................4-4
Compressor Circuit Boards ........................4-6
Compressor Board Related Circuit ..........4-12
Defrost Circuit Boards .............................4-22
Defrost Timer Motor ................................4-28
Defrost Control Circuits ...........................4-28
Other Controls ..........................................4-32
Power Monitor..........................................4-33

Required Field Wire Size ...........................4-2
Alarm Board Troubleshooting....................4-5
Compressor Board Troubleshooting

Mechanical ...........................................4-9
EPC.....................................................4-11

Defrost Board Troubleshooting

Mechanical Time Clock .....................4-25
Fibertronic Time Clock ......................4-27

Alarm Board Circuits .................................4-3
Alarm Board...............................................4-4
Compressor Board Faceplate .....................4-6
Compressor Circuit Board Connections.....4-7
Compressor Board – Mechanical 

Low Pressure Control...........................4-8

Compressor Board  – EPC Control ..........4-10
K2 and Motor Contactor Circuits.............4-12
K1 and Compressor Alarm Circuits................4-13
Parallel Switchback Controls ...................4-14
Series Switchback Controls......................4-15
Switchback Controls ................................4-16
Koolgas and Interlock Relays ..................4-17
Compressor Protection .............................4-18
Carlyle Internally Compounded

Compressor Protection .......................4-19

Head Cooling Fan and 

Demand Cooling ................................4-20

Circuits Parallel to the Compressor

Motor Contactor Coil .........................4-21

Branch Board Faceplate ...........................4-22
Defrost Board Inputs and Outputs............4-23
Defrost Board Mechanical Timer.............4-24
Defrost Board Electronic Timer ...............4-26
Defrost Control Circuit.............................4-28
Suction Stop Koolgas Defrost ..................4-29
Electric Defrost ........................................4-30
Off Cycle Defrost .....................................4-31
Refrigeration Thermostat w/ Header

Mounted Solenoid ..............................4-32

Wiring Defrost Termination

Thermostats ........................................4-32

Power Monitor and Slave Contactor ........4-33
Electrical Hookup.....................................4-33

Revised August 1, 1996

P/N  340272A