Low Ice Production - Hoshizaki TM-500AAE Service Manual

PROBLEM
[3] (Continued)
[4] Compressor
starts, but Gear
Motor will not
operate after 15
seconds.
[5] Gear Motor and
Compressor
start, but no ice
is produced.

2. LOW ICE PRODUCTION

PROBLEM
[1] Low ice
production.
POSSIBLE CAUSE
b) Controller Board
c) Pressure Switch
a) Gear Motor
b) Power Supply
c) Controller Board
a) Refrigerant Line
b) Line Valve
POSSIBLE CAUSE
a) Refrigerant Line
b) High-side
Pressure Too
High
c) Expansion Valve
d) Evaporator
1. Broken.
1. Dirty Condenser fins.
2. Ambient temperature
too warm.
3. Fan not rotating.
4. Refrigerant
overcharged.
5. Refrigerant line or
components plugged.
6. Bad contacts.
7. Loose connections.
1. Loose connections.
2. Motor winding opened
or earthed.
3. Motor Protector
tripped.
1. Circuit Ampacity too
low.
1. Broken.
1. Gas leaks.
2. Refrigerant line
clogged.
1. Bad contacts.
2. Loose connections.
3. Broken.
1. Gas leaks.
2. Refrigerant line
clogged.
3. Overcharged.
1. Dirty Air Filter or
Condenser.
2. Ambient temperature
too warm.
3. Fan rotating too slow.
1. Low-side pressure
exceeding the limit.
1. Evaporator deformed.
44
REMEDY
1. Replace.
1. Clean.
2. Check for recommended
temperature.
3. See 3 - [1] - a).
4. Recharge.
5. Clean and replace Drier.
6. Check for continuity and
replace.
7. Tighten.
1. Tighten.
2. Replace.
3. Find out the cause of
overheat or overcurrent.
1. Install a larger-sized
conductor.
1. Replace
1. Check for leaks with a leak
detector. Reweld leak,
replace Drier and
Mechanical Seal, and
charge with refrigerant.
The amount of refrigerant is
marked on Nameplate or
Label.
2. Replace the clogged
component.
1. Check for continuity and
replace.
2. Tighten.
3. Replace.
REMEDY
1. See 1 - [5] - a).
2. Replace the clogged
component.
3. Recharge.
1. Clean.
2. Check for recommended
temperature.
3. See 3 - [1] - a).
1. Adjust or replace.
1. Replace.