Hoshizaki RM-45-SD User manual

SERVICE MANUAL
FOR MODEL RM-45-SD

REQUIRED TOOLS
CORDLESS DRILL
SCREWDRIVER SET WITH
SOCKET OF 9/32” PIERCING VALVE
OPEN WRENCH OF 1/2”
CUTTING TUBING
VISE GRIP PRECISION FLAT BLADE SLOTTED
SCREWDRIVER
RATCHET WITH SOCKET OF
7/16”

REQUIRED EQUIPMENT
OXIACETILENE
EQUIPMENT DRY NITROGEN TANK VACUUM PUMP WITH
MICRON GAUGE
LEAK DETECTOR REFRIGERANT RECOVERY
MACHINE
MANIFOLD HIGH & LOW
GAUGE PRESSURE KIT

CONTENTS
•Instructions to replace LED Power Supply.
•Instructions to replace high intensity LED flexible strips.
•Instructions to replace interior LED strips lights.
•Instructions to replace condenser fan motor.
•Instructions to replace evaporator fan motor.
•Instructions to replace electronic thermostat.
•Instructions to replace thermostat ambient sensor.
•Instructions to replace starting relay, overload protector and starting capacitor.
•Instructions to replace compressor.
•Instructions to replace sliding doors.

2. Pull out the top of the header sign. 3. Grab the acrylic sign and pull it out.
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace LED Power Supply.
1. Unscrew the two screws that hold
in place the top of the header sign ,
using a Phillips screwdriver # 2

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace LED Power Supply.
4. In order to remove the Power
Supply, unscrew the two screws that
hold it in place using a Phillips
screwdriver # 2.
5. Disconnect the Power Supply’s electrical
connector.
6. To install the new Power Supply
reverse the previous steps.

Instructions to Replace High Intensity LED Flexible Strips .
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
1. Using a Phillips screwdriver # 2
unscrew the two screws that hold in
place the top of the header sign .
2. Pull out the top of the header sign. 3. Grab the acrylic sign and pull it out.

5. Remove the high intensity LED flexible strip by
pulling it out from its base. Repeat this step to
remove the other high intensity LED flexible strip.
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace High Intensity LED Flexible Strips .
4. Disconnect the LED strip Light’s electrical
connector .
6. To install the
new high
intensity LED
flexible strip,
reverse the
previous steps.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace LED Strips .
1. Remove the LED profile
cover from the breaker
strip using a slotted
screwdriver.
2. Disconnect the LED strip
Light’s the electrical
connector .
4. To install the new LED
strip reverse the
previous steps.
LED cover
profile
3. Use a slotted
screwdriver to pull out
the LED strip.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
1. Unscrew the four screws
that hold in place the
front grill , using a
Phillips screwdriver # 2
2. Pull out the front grill .
3. Disconnect the Tyco
electrical connector of
the condensing unit.
4. Remove the two bolts
that hold in place the
condensing unit rails
using a 1/2” open
wrench.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
7. Disconnect the Tyco
electrical connector of
the condenser fan motor.
8. Unscrew the two screws
that hold in place the
base motor to the rails
using a Phillips
screwdriver # 2
5. Pull out the condensing
unit from the base of the
cabinet.
6. The condensing unit can
be removed all the way
out for easier service.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
9. Pull out the condenser
fan.
10. Remove the bolt that hold
in place the fan blade to
the fan motor using a
9/32” socket screwdriver.
11. Unscrew. the two
screws that hold in
place the base motor
to the fan motor using
a 9/32” socket
screwdriver.
12. To install the new
condenser fan motor
reverse the previous
steps.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace the Evaporator Fan Motor.
1. Unscrew the four screws that hold in
place the fan guard on the air baffle
using a Phillips screwdriver # 2.
2. Remove the bolt that hold in place
the fan blade to the fan motor
using a 9/32” socket screwdriver.
3. Unscrew the four screws that hold in
place the support base motor to the
top of cabinet using a Phillips
screwdriver # 2.
Fan Guard

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace the Evaporator Fan Motor.
4. Disconnect the Tyco electrical
connector of the evaporator fan
motor located in the top of cabinet.
5. Unscrew the three screws that hold in place
the support base motor to the fan motor
chassis using a 9/32” socket screwdriver .
6. To install the new evaporator fan
motor reverse the previous steps.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace The Electronic Thermostat.
1. Remove the front
frame of the
thermostat using
your fingers.
2. Turn 90°both screws to
loosen their cams and the
front panel will detach .
Then, proceed to remove
the thermostat from the
panel, by keeping it
horizontally.
3. Disconnect all the
connectors located in
the back of the
thermostat. .
4. To install the new
electronic thermostat
reverse the previous
steps.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to replace Ambient Sensor.
1. Remove the front
frame of the
thermostat using
your fingers.
2. Turn 90°both screws to
loosen their cams and the
front panel will detach .
Then, proceed to remove
the thermostat from the
panel, by keeping it
horizontally.
4. Unscrew the two screws
that hold the wires in
place of the ambient
sensor using a precision
flat blade slotted
screwdriver.
3. Disconnect the
connector of the
ambient sensor
located on the back of
the thermostat, shown
in the picture.

8. Pull both ambient
sensors through the
cut out of display .
Once the splice is
visible, remove the
tape and damage
sensor and connect the
new, and reverse the
previous steps to install
the thermostat.
7. Use masking tape to splice
the damaged ambient
sensor with the new. This
operation will serve as
guide to remove the
damage sensor and
connect the new to the
connector of the
thermostat.
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to replace Ambient Sensor.
6. Pull out the ambient
sensor from its plastic
clip support.
5. Unscrew the two screws
that hold in place the light
switch support plate on the
baffle using a Phillips
screwdriver # 2 .

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instruction to Replace Starting Relay, Overload Protector and Starting Capacitor.
1. Unscrew the four screws
that hold in place the
front grill , using a
Phillips screwdriver # 2
2. Pull out the front grill.
3. Disconnect the Tyco
electrical connector of
the condensing unit.
4. Remove the two bolts
that hold in place the
rails using a 1/2” open
wrench, these rails
support the condensing
unit.

7. Remove the two bolts that
hold in place the electrical
box cover using a ¼” socket
screwdriver.
8. Remove the electrical box
cover by pulling it out.
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instruction to Replace Starting Relay, Overload Protector and Starting Capacitor.
5 Pull out the condensing
unit from the base of the
cabinet.
6. The condensing unit can
be removed all the way
out for easier service.

Relay
Starting Capacitor
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instruction to Replace Starting Relay, Overload Protector and Starting Capacitor.
LOCATION OF ELECTRICAL CONNECTIONS
Starting capacitor wires
connections
Ground wire .
Start Relay wire
connections
Overload protector
Overload protector
wires connection