Stoelting E157, Service Manual

Page: 43 / 52

35
8.7 COMPRESSOR WILL NOT START - HUMS BUT TRIPS ON OVERLOAD PROTECTOR
Improperly wired ............................................................... Check wiring against diagram.
Low voltage to unit ........................................................... Determine reason and correct.
Start capacitor defective .................................................. Replace start capacitor.
Relay failing to close ........................................................ Determine reason and correct. Replace relay if necessary.
Compressor motor has a winding open or shorted ........... Replace compressor.
Internal mechanical trouble in compressor ....................... Replace compressor.
8.8 COMPRESSOR STARTS, BUT DOES NOT SWITCH OFF OF START WINDING
Inproperly wired ................................................................ Check wiring against diagram.
Low voltage to unit ........................................................... Determine reason and correct.
Excessive high discharge pressure .................................. Check for restrictions.
Compressor motor has a winding open or shorted ........... Replace compressor.
Internal mechanical trouble in compressor ....................... Replace compressor.
8.9 COMPRESSOR START CAPACITOR OPEN, SHORTED OR BLOWN
Relay failure ..................................................................... Replace relay.
Prolonged operation on start cycle due to low
voltage to unit ............................................................... Determine reason and correct.
Prolonged operation on start due to improper relay .......... Replace relay.
Excessive short cycling ................................................... Determine reason and correct.
Improper capacitor ........................................................... Determine correct size and replace.
Loose wires ..................................................................... Locate and correct.
8.10 FREEZER WILL NOT START
Freezer is unplugged ....................................................... Plug in freezer.
Toggle switch in OFF position .......................................... Place toggle switch in ON or STIR ONLY position.
Blown fuse or tripped circuit breaker in building ............... Check for blown fuse or tripped circuit in building & replace.
Reset switch is in the cut-out (down) position .................. Put reset switch in normal operating position (up).
ON-OFF-STIR ONLY switch has a loose wire or
defective ....................................................................... Check, repair, or replace switch.
8.11 DRIVE MOTOR OVERLOAD TRIPS (FREEZER SHUTS DOWN WHEN RUNNING)
Dirty condenser ............................................................... Clean condenser.
Improper Brix readings ..................................................... Refill with product that has Brix reading between 11-13.
Consistency setting is too firm ........................................ Adjust tension spring.
Improper refrigerant charge .............................................. Adjust charge.
Large voltage changes ..................................................... Check supply voltage.
Torque control not stopping compressor ........................... Check torque control.
8.12 COMPRESSOR WILL NOT RUN, BUT DRIVE MOTOR RUNS
Voltage is too low ............................................................. Check voltage (See Nameplate).
No power to compressor .................................................. Check wire harness, terminal and switches in compressor
circuit and replace or repair.
Compressor start capacitor is defective ........................... Test capacitor and replace if necessary.
Overload protector is tripped ............................................ Check&test overload. If amps are normal, replace overload.
Compressor relay if defective ........................................... Test relay and replace if necessary.
Toggle switch is in STIR ONLY position ........................... Place toggle switch in ON (the stirring & freezing)position.
Compressor problem ........................................................ Refer to Subsections 8.1 through 8.9.
Compressor is defective ................................................... Check compressor and replace if necessary.
Torque control defective .................................................... Check and replace torque control.
24 Hour Timer not set for compressor operation .............. Reset timer.
8.13 PRODUCT DISPENSES INCORRECTLY
Trapped air under divider plate .......................................... Remove trapped air.
Lower half of cylinder is frozen to agitator ........................ Mix too lean. Thaw and refill with correct mix.
Freezer is being overdrawn .............................................. Slow down rate of draw.
Upper half of cylinder is frozen ......................................... Mix too lean in upper cylinder. Thaw/fill with correct mix.