Table of Contents
Advertisement
MCM1062R
SERVICE DIAGNOSIS
SYMPTOM
Low ice production
No ice falling in bin, unit frozen up
Ice maker stuck in harvest cycle
Ice is mal-formed
Water overflows from reservoir into
bin.
POSSIBLE CAUSE
3. High head pressure, a result of a
dirty condenser
4. Hot gas valve leaks thru
5. High air temp. for condenser.
1. Cube size control will not close
2. Timer motor open
3. Plug in relay contacts open
4. Not enough time during the
harvest cycle to drop all ice
5. Cube size wrong
6. Hot gas valve restricted.
7. Not enough water to help harvest.
8. Head pressure too low
1. Relay coil open
2. Timer stuck in harvest cycle
3. Timer microswitch N.O. contacts
will not close.
1. Shortage of water
2. Evaporator water passages
restricted.
3. Cube size set wrong
1. Restricted sump drain
2. Inlet water valve lets in too much
water
October 1993
Page 24
PROBABLE CORRECTION
3. Clean condenser, check fan
motor
4. Replace hot gas valve
5. If possible, reduce condenser air
inlet temperature.
1. Check temp. of suction line, cube
size control will not close if temp.
too high. If temp. low enough,
replace cube size control
2. Replace timer
3. Replace relay
4. Adjust timer for more harvest time
5. Adjust cube size
6. Replace hot gas valve.
7. Check for restriction of water
supply.
8. Check pressure control valve.
Check for low refrigerant charge.
1. Replace relay
2. Check for power to timer motor, if
power replace timer, if no power to
timer motor, replace relay.
3. Replace timer.
1. Check for restriction of water
supply. Check for leak.
2. Clean ice maker.
3. Adjust cube size control
1. Repair drain
2. Replace valve
Advertisement
Table of Contents
