Service Diagnosis; No Ice Production - Hoshizaki TM-500AAE Service Manual

IV. SERVICE DIAGNOSIS
Display error record by operating the Operation Board (See "III. 7. [b] 2) Displaying Error
Record"). Check for a possible cause and service the unit.

1. NO ICE PRODUCTION

PROBLEM
[1] The icemaker
will not start.
[2] Water does not
stop, and the
icemaker will not
start.
[3] Water has been
supplied, but the
icemaker will not
start.
POSSIBLE CAUSE
a) Power Supply
b) Fuse (Controller
Board)
c) Operation Switch
d) Transformer
e) Water Valve
f) Water Supply Tap
g) Plug and
Receptacle
(Control Box)
h) Spout Switch
(Proximity
Switch)
i) Overload
Protector
j) Bin Control
a) Float Switch
b) Flush Water
Valve
c) Hoses
a) Gear Motor
Protector
(Thermal
Breaker)
1. OFF position.
2. Loose connections.
3. Bad contacts.
4. Blown fuse.
5. Voltage too low.
1. Blown out. No
indication on
Operation Board.
1. OFF position.
2. Bad contacts.
1. Coil winding opened.
1. Coil winding opened.
1. Closed.
2. Water failure.
1. Disconnected.
2. Terminal out of Plug or
Receptacle.
1. Tripped.
1. Tripped.
1. Bad contacts.
2. Fixed mounting
selected by Select
Switch (floor
mounting).
3. Dirty Sensor Cover.
4. No bin control hole in
mounting surface.
1. Bad contacts.
2. Float does not move
freely.
1. Valve seat clogged
and water leaking.
1. Disconnected.
1. Tripped.
43
REMEDY
1. Move to ON position.
2. Tighten.
3. Check for continuity and
replace.
4. Replace.
5. Get recommended voltage.
1. Find out the cause of short
circuit (ex. Control Water
Valve, Flush Water Valve),
resolve it, and replace
Controller Board.
1. Move to ON position.
2. Check for continuity and
replace.
1. Replace.
1. Replace.
1. Open.
2. Wait till water is supplied.
1. Connect.
2. Insert Terminal back in
position.
1. See "III. 6. [i] SPOUT
SWITCH".
2. Reset.
1. Check for continuity and
replace.
2. Select the proper floor
mounting mode.
3. Remove Switch and clean
or replace Sensor Cover.
4. Move the unit and make a
hole.
1. Check for continuity and
replace.
2. Clean or replace.
1. Clean or replace.
1. Connect.
1. Find out the cause, resolve
it, and press Reset Button
on Motor Protector.