Scotsman MAR 106, Service Manual

Page: 33 / 42

SECTION VI
SERVICE DIAGNOSIS
The Service Diagnosis Section is for use in aiding
the servicemen in diagnosing a particular problem
for pin-pointing the area in which the problems
lines, thus an ever available reference for proper
corrective action. The following chart lists corrective actions for the
causes of known symptoms of certain problems
that can occur in the ice makingrefrigerarion
system.
SYMPTON POSSYBLE CAUSE CORRECTION
Red Light glows- Intermittent water supply Water shut-off valve closed.
Lo-water pressure. or too low water pressure. Check and clean water strainer.
The unit does not make ice. Fiber key in gear reducer Remove Gear box
bore broken. and change fiber key.
V-belt loose or broken. Check. Repair or replace.
The compressor runs but no Gear in gear box stripped. Check and replace.
ice is made.
Pulley loose on motor shaft. Repair.
Water not entering reservoir. Check and clean. Water float
valve to be cleaned.
Red Light glows- Hi-pressure control cut-off Check cooling water at
Hi-pressure excessive. unit operation. condenser. Condenser tube
clogged-up. Water regulating
valve to be re-adjusted.
Fan motor out of operations.
Green Light is Blown fuse. Replace fuse and check for
off. Unit will not run. cause of blow fuse.
Loose electrical connection. Check wiring.
Switch in OFF position. Turn switch to ON.
Inoperative master switch. Replace switch.
Spout switch cut-out. Check ice chute arrangement.
Contactor coil-open winding. Replace contactor.
1. ICE MAKING - REFRIGERATION SYSTEM
Page 33