Hoshizaki DIM-30DE-1 User manual

NO. E2HA-917
ISSUED: OCT.10,2013
REVISED:
SERVICE MANUAL
HOSHIZAKI
CUBE ICE DISPENSER
MODEL DIM-30DE-1

i
 CONTENTS PAGE
I. SPECIFICATIONS -------------------------------------------------------------------------------------1
1. DIMENSIONS/CONNECTIONS ----------------------------------------------------------------1
II. GENERAL INFORMATION -------------------------------------------------------------------------2
1. CONSTRUCTION ----------------------------------------------------------------------------------2
[a] OVERVIEW --------------------------------------------------------------------------------------2
[b] WATER CIRCUIT AND MACHINE COMPARTMENT ---------------------------------3
2. CONTROLLER BOARD --------------------------------------------------------------------------4
[a] CONTROLLER BOARD LAYOUT ---------------------------------------------------------5
[b] BEFORE CHECKING CONTROLLER BOARD ----------------------------------------6
[c] SEQUENCE - LED INDICATORS ON/OFF PATTERN -------------------------------7
[d] FAULT DIAGNOSIS ---------------------------------------------------------------------------8
[e] CONTROLS AND ADJUSTMENT ------------------------------------------------------- 10
III. OPERATING INSTRUCTIONS ------------------------------------------------------------------ 12
1. IN CASE OF LOW WATER -------------------------------------------------------------------- 12
2. PREPARING THE ICE DISPENSER FOR LONG STORAGE ------------------------ 12
IV. MAINTENANCE ------------------------------------------------------------------------------------ 13
1. SPOUT, ICE STATION, PUSH BUTTON --------------------------------------------------- 13
2. AIR FILTER ----------------------------------------------------------------------------------------- 13
3. DRAIN PAN, STORAGE BIN, FRONT PANEL (UPPER) ------------------------------- 14
4. ICE STATION DRAIN TRAP ------------------------------------------------------------------- 14
5. WATER VALVE ------------------------------------------------------------------------------------ 15
V. TECHNICAL INFORMATION --------------------------------------------------------------------- 16
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT --------------------------------------- 16
2. WIRING DIAGRAM ------------------------------------------------------------------------------ 17
3. TIMING CHART ----------------------------------------------------------------------------------- 18
[a] NORMAL OPERATION --------------------------------------------------------------------- 18
[b] BIN CONTROL -------------------------------------------------------------------------------- 19
4. SEQUENCE --------------------------------------------------------------------------------------- 20
5. PERFORMANCE DATA ------------------------------------------------------------------------- 22
VI. SERVICE DIAGNOSIS --------------------------------------------------------------------------- 23
1. NO ICE PRODUCTION ------------------------------------------------------------------------- 23
2. LOW ICE PRODUCTION ----------------------------------------------------------------------- 25
3. ABNORMAL ICE ---------------------------------------------------------------------------------- 25
4. OTHERS -------------------------------------------------------------------------------------------- 26
VII. REMOVAL AND REPLACEMENT------------------------------------------------------------- 27
1. PANELS --------------------------------------------------------------------------------------------- 27
[a] FRONT PANEL (UPPER) ------------------------------------------------------------------ 27
[b] FRONT PANEL (LOWER) ----------------------------------------------------------------- 27
[c] TOP PANEL ------------------------------------------------------------------------------------ 27

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[d] AIR GUIDE ------------------------------------------------------------------------------------- 27
[e] REFRIGERATOR COVERS --------------------------------------------------------------- 28
[f] SWITCH BOX ---------------------------------------------------------------------------------- 28
2. SERVICE FOR REFRIGERANT LINES ---------------------------------------------------- 29
[a] SERVICE INFORMATION ----------------------------------------------------------------- 29
[b] REFRIGERANT RECOVERY ------------------------------------------------------------- 30
[c] EVACUATING AND RECHARGE -------------------------------------------------------- 30
3. COMPRESSOR ----------------------------------------------------------------------------------- 31
4. DRIER ----------------------------------------------------------------------------------------------- 32
5. EVAPORATOR ------------------------------------------------------------------------------------ 33
6. HOT GAS VALVE --------------------------------------------------------------------------------- 34
7. WATER PAN ASSEMBLY ---------------------------------------------------------------------- 35
8. PUMP MOTOR ------------------------------------------------------------------------------------ 36
9. WATER VALVE ------------------------------------------------------------------------------------ 36
10. ACTUATOR MOTOR ---------------------------------------------------------------------------- 37
11. CAM ARM ------------------------------------------------------------------------------------------ 37
[a] CAM ARM (A) - ACTUATOR MOTOR SIDE ------------------------------------------- 37
[b] CAM ARM (B) - REAR SIDE -------------------------------------------------------------- 37
12. ACTUATOR TOGGLE SWITCH -------------------------------------------------------------- 38
13. CONTROLLER BOARD ------------------------------------------------------------------------ 40
[a] MODIFICATION ------------------------------------------------------------------------------ 40
[b] REPLACEMENT ----------------------------------------------------------------------------- 41
14. THERMISTOR FOR CUBE CONTROL ----------------------------------------------------- 42
15. FAN MOTOR -------------------------------------------------------------------------------------- 43
16. GEAR MOTOR ------------------------------------------------------------------------------------ 43
17. BIN CONTROL SWITCH ----------------------------------------------------------------------- 44
18. TRANSFORMER --------------------------------------------------------------------------------- 45
19. POWER SUPPLY CORD ----------------------------------------------------------------------- 45
20. PUSH BUTTON SWITCH AND PILOT LAMP --------------------------------------------- 46

1
I. SPECIFICATIONS
1. DIMENSIONS/CONNECTIONS

2
II. GENERAL INFORMATION
1. CONSTRUCTION
[a] OVERVIEW
Power Switch
Power Cord
Front Panel (Upper)
Front Panel (Lower)
Push Button
Pilot Lamp
Spout
Ice Station
Switch Cover
Air Filter
Louver

3
[b] WATER CIRCUIT AND MACHINE COMPARTMENT
Water Valve
Water Supply Pipe
Pump Motor
Actuator Motor
Gear Motor
Transformer
Drain Hose
Power Switch
Cover
Water Supply Inlet
Evaporator
Water Tank
Drain Pan
Bin Control Switch
Auger
Drain Outlet
Control Box
Compressor
Fan Motor
Condenser

4
2. CONTROLLER BOARD
IMPORTANT
If receiving a service call, ask the user to turn off the power to the ice
dispenser and turn it on again, while watching the ice dispenser. This will
reset the controller, and in some cases normal operation will resume.
CAUTION
1. Check that the ice dispenser has been earthed properly. If not, the
controller board will not work properly.
2. Do not change wiring and connections, or the controller board will not
work properly.
3. Do not touch the reverse side of the controller board and tiny electronic
devices on it.
4. Do not repair the electronic devices and parts on the controller board in
the eld. Replace the whole board assembly when it fails.
5. To get static free, always touch the metal part of the ice dispenser before
servicing. Electrostatic discharge will cause severe damage to the
controller board.
6. The signal ground wire must be connected to the shield plate when
replacing the controller board after service.
7. The controller board is fragile. Handle with care.
* Do not drop the board on the oor.
* Make sure that the board is placed correctly into the guides in the
control box. Mis-alignment could cause breakage when replacing the
control box cover.
* Handle the board by the edges only. Do not touch the electric parts and
devices except the transformer.

5
2
2. INPUT/OUTPUT
[a] INPUT/OUTPUT LAYOUT
The layout of the main inputs and outputs (connectors etc.) of the Controller Board is
as shown below.
Input Connector
(Ambient Temp Thermistor)
Earth Connector (Surge Absorber)
X1
K3
1
3
K1
1
7
K4
41
K9
1
2
K8
21
Transformer
X2
X4
X3
K2
1
6
Input Connector (Cube Control Thermistor)
Connector (Power Supply, Compressor)
Input Connector (Bin Control Sw, Select Sw)
Output Connector (AM, PM, FM, HV, WV)
Service Call Lamp
DSW 1 (Dimple)
Reset Switch
DSW 2 (Harvest)
DSW 4 (Water Supply)
DSW 5 (Code Setting 1)
[a] CONTROLLER BOARD LAYOUT

6
[b] BEFORE CHECKING CONTROLLER BOARD
Check the power source voltage and the components as shown in the table below.
Component
1. Actuator Toggle
Switch
2. Thermistor
(on evaporator)
3. Bin Control Switch
COM.
N.O.
N.C.
DEFROST FREEZE
Holder
Screw
Thermistor
Evaporator
Procedure
Manually set the switch in the FREEZE
and DEFROST positions, and check the
continuity.
CAUTION
Thermistor sensor part is fragile,
glass sealed. Handle with care.
* Disconnect the connector K4 on the
board.
* Remove the screw and the thermistor
holder on the evaporator.
* Immerse the sensor part in a glass
containing ice and water for 5 minutes.
* Check the resistance between K4
connector pins.
* Replace the thermistor in its correct
position.
* Connect K4.
Manually set the micro switch in the
TRIP and RESET positions, and check
the period.
Normal
DEFROST
COM-NO Open
COM-NC Closed
FREEZE
COM-NO Closed
COM-NC Open
5 -7 kilohms
Approx.
TRIP(Closed) 10 sec.
RESET(Open) 80 sec.

7
12
[d] SEQUENCE
X1: OFF
X2: ON
X3: OFF
Freeze Cycle
Water Pan
closes
Harvest Cycle
Freeze Backup Timer
Water Supply
Timer
Harvest Backup Timer
Ice Melting Timer
Water Pan Timer
(initial cycle only) Water Pan
opens
X1: OFF
X2: ON
X3: ON
X1: OFF
X2: ON
X3: ON
X1: ON
X2: OFF
X3: ON
X1: ON
X2: OFF
X3: OFF
[c] SEQUENCE - LED INDICATORS ON/OFF PATTERN

8
[d] FAULT DIAGNOSIS
Check the status of the service lamp on the controller board (LED-5, See “[c]
SEQUENCE”) by removing the control box cover.
Lamp ON - Water plate closed
This tends to indicate the back-up timer has stopped machine operation during the
freeze cycle. High ambient and water temperatures are an obvious cause. But check out
each component that could result in an extended freezing time (see guide below).
Lamp ON - Water plate open
The timer has stopped the machine because of an excessive defrost time. See the
guide below to check out the probable cause.
Lamp ashing ON/OF
If on the rst cycle, check out the cam operation and/or toggle switch. If the machine
has been in service for some time, the controller board may be at fault.
REMEMBER: Hoshizaki controllers are very reliable. They also control every
component’s operation. So if a component malfunctions, the controller
will respond.
Do not replace controllers in an attempt to shorten the diagnostic process
and not before carefully checking the actual fault and possible cause.
When the ice dispenser stops, the controller board interlock indicator shows possible
faults.
PATTERN
1Actuator toggle switch
lever bent
Cam arm (A) broken
Defective actuator
motor
Defective controller
board
Replace actuator
toggle switch
Replace
Replace
Replace
(1)
(2)
(3)
(4)
Only
First
Cycle
OR
Flashing
Cam Arm
Lever
INTERLOCK
INDICATOR
WATER TANK
POSITION POSSIBLE CAUSE REMEDY

9
PATTERN
2
3
4
Clogged air lter and/or
condenser
Water leak from water
solenoid valve
Gas leak from hot gas
solenoid valve
Fan motor stopped
Gas leak
Compressor stopped
Hot gas solenoid valve
closed and will not open
Gas leak
Compressor stopped
Actuator toggle switch
lever bent
Cam arm (A) broken
Defective actuator
motor
Cam pin damaged
Defective cube control
thermistor
Clean or replace
Replace
Replace
Replace
Check for leak
Replace comp.
starting capacitor
Replace
Check for leak
Replace comp.
starting capacitor
Replace actuator
toggle switch
Replace
Replace
Replace cam pin
and cam arm (A)
Replace
(1)
(2)
(3)
(4)
(5)
(6)
(1)
(2)
(3)
(1)
(2)
(3)
(4)
(5)
Freeze Cycle
Defrost Cycle
Gas Leak
0V
Hot
Leak
0V
Gas
100V
Gas
OR
Cam Arm
Lever
Pin
Actuator
Motor
INTERLOCK
INDICATOR
WATER TANK
POSITION POSSIBLE CAUSE REMEDY

10
[e] CONTROLS AND ADJUSTMENT
1) Cube Control (DSW1)
A cube control on the controller board is factory adjusted to produce constant cubes
all year around. When the user needs ice cubes with smaller or larger diameter holes,
adjust the rotary switch DSW1 (cube control) using a miniature Phillips screwdriver.
CAUTION
When adjusting the rotary switch DSW1 for smaller dimple cubes, it may be
necessary to also increase the water supply time to melt away fragments
of ice obstructing the water plate which could prevent cubes falling into the
bin.
LARGER HOLE STANDARD HOLE SMALLER HOLE
2) Defrost Control (DSW2)
The defrost control regulates the time period between
ice-drop and actuator motor restart. Any adjustment
will not be required for normal operation. Factory
setting is shown in the table below. When servicing or
replacing the controller board, adjust the rotary switch
DSW2 using a miniature Phillips screwdriver.
Ambient Temp. Approximate Period (sec.)
30°C 20
20°C 30
10°C 60
Longer
DSW2

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3) Water Supply Control (DSW4)
When adjusting the rotary switch DSW1 (cube control) for smaller dimple cubes, it may
be necessary to adjust the water supply time setting as well, following the instruction be-
low.
Note: Any adjustment will not be required under normal use. If an insufficient water
supply results in production of cloudy ice, check to see if the lter of the water
valve is clogged or water pressure is reduced.
Adjust the rotary switch DSW4 to 3 (marked by
arrow) using a miniature Phillips screwdriver.
Water supply time will be continuous when the
water plate is open.
Normal setting 0 = 15 sec. with water plate open
DSW4

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III. OPERATING INSTRUCTIONS
1. IN CASE OF LOW WATER
1) Remove the switch cover, and turn off the
power switch.
2) Close the water tap.
3) Unlock the front panel (upper) by turning
the hook counterclockwise with a flat
blade screwdriver. Lift off the front panel
(upper). See Fig. 1.
4) Wait for 5 minutes, and turn on the power
switch.
5) When a click sound is heard 40 seconds after the
icemaking compartment starts operation, turn off the
power switch immediately to drain the water tank.
6) Refit the front panel (upper), and push down its top
while turning the hook clockwise. See Fig. 2.
7) When water supply is resumed, open the drain valve
rst. Then, gradually open the water tap to completely
drain out red water.
8) Close the drain valve.
9) Turn on the power switch to restart the ice dispenser.
2. PREPARING THE ICE DISPENSER FOR LONG STORAGE
1) Press the push button to dispense all ice from the storage bin.
2) Follow the steps 1) to 5) in “1. IN CASE OF LOW WATER”.
3) Unplug the ice dispenser.
4) Clean the storage bin liner, spout, drain pan and ice station, and dry them thoroughly.
5) Ret the front panel (upper), and push down its top while turning the hook clockwise.
Flat Blade
Screwdriver
Unlock
Lift off
Fig. 1
Flat Blade
Screwdriver
Lock
Push down
Fig. 2

13
IV. MAINTENANCE
WARNING
1. Before carrying out any cleaning or maintenance operations, unplug the
ice dispenser from the electrical supply network.
2. A trained service person should clean and sanitize the ice dispenser
water system at least twice a year. The condenser should be checked
and cleaned at least once a year.
3. This appliance must not be cleaned by use of a water jet.
1. SPOUT, ICE STATION, PUSH BUTTON
Wipe the exterior and ice station at least once per week with a clean, soft cloth. Use a
damp cloth containing a neutral cleaner to wipe off grease or dirt.
2. AIR FILTER
Plastic mesh air lters remove dirt or dust from the air, and keep the condenser from
getting clogged. If the lters get clogged, the icemaker’s performance will be reduced.
Remove and clean the air lter(s) at least twice per month:
1) Slide the air lter off the lter guide the louver.
2) Clean the air lter by using a vacuum cleaner. When
severely clogged, use warm water and a neutral
cleaner to wash the air lter.
3) Rinse and dry the air lter thoroughly.
Fig. 3
Louver
Air Filter

14
Fig. 4
Drain Pan
Bin Control
Switch Lead
Recess
Fig. 5
Cap
Ice Station
Fig. 6
Tab
Notch
3. DRAIN PAN, STORAGE BIN, FRONT PANEL (UPPER)
1) Follow the steps 1) to 3) in “III. 2. PREPARING THE ICE DISPENSER FOR LONG
STORAGE.”
2) Pull out the drain pan hose from the drain hole in the storage bin.
3) Remove the thumbscrew at the front, and take out the drain pan from the storage bin.
4) Soak the drain pan in warm water containing a neutral cleaner for at least 3 minutes.
Rinse thoroughly with clean water.
5) Wipe the backside of the front panel (upper) with a damp cloth containing a neutral
cleaner. Use a clean damp cloth to wipe off the cleaner.
6) Wash the storage bin liner with clean water.
7) Ret the drain pan and front panel (upper) in their correct
position. Run the bin control switch lead through the
recess in the drain pan.
4. ICE STATION DRAIN TRAP
1) Lightly lift the cap at the center of the ice station
and turn it counterclockwise.
2) Lift the cap straight off.
3) Soak the cap in warm water containing a neutral
cleaner for at least 3 minutes. Rinse thoroughly
with clean water.
4) Wipe the notches in the ice station with a damp
cloth containing a neutral cleaner. Use a clean
damp cloth to wipe off the cleaner.
5) Ret the cap in the ice station by tting the tabs
in the notches.
6) Turn the cap tightly clockwise.

15
5. WATER VALVE
1) Unplug the ice dispenser or disconnect the power source.
2) Close the water supply tap.
3) Remove the top panel and front panel (upper).
4) Disconnect the tting nut from the water valve.
5) Remove the mesh lter from the water valve.
6) Clean the mesh using a brush.
7) Replace the mesh and tting nut in their correct positions.
8) Open the water supply tap.
9) Plug in the ice dispenser or connect the power source.
10) Check for leaks.
11) Replace the panels in their correct positions.
Fig. 7

16
V. TECHNICAL INFORMATION
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT
Water
Valve
Evaporator
Pump
Motor
Water Tank
Capillary Tube
Hot Gas
Valve
Drier
Condenser
Fan
Motor
Compressor
Water Circuit
Refrigerant Circuit
Strainer
U Trap
Drain
Outlet
Ice Station
Trap
Accumulator
Controller
Board
Actuator
Motor
Drain Pan Storage Bin
Bin Control
Switch

17
2. WIRING DIAGRAM