Hoshizaki RM-49 User manual

SERVICE MANUAL
FOR MODEL RM-49

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

REQUIRED EQUIPMENT
OXIACETILENE
EQUIPMENT
DRY NITROGEN
EQUIPMENT
VACUUM PUMP WITH
MICRON GAUGE
MANIFOLD PRESSURE
GAUGES LEAK DETECTOR REFRIGERANT RECOVERY
MACHINE

•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 door.
CONTENTS

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
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.
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.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace High Intensity LED Flexible Strips .
1. Unscrew the two screws that hold in
place the top of the header sign ,
using a Phillips screwdriver # 2
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 High Intensity LED Flexible Strips .
4. Disconnect the electrical connector
of LED strip Light.
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.
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 of breaker strip using
a slotted screwdriver.
LED cover
profile
2. Disconnect the electrical
connector of LED strip
Light.
3. Use a slotted screwdriver
to pull out the LED strip.
4. To install the new LED strip
reverse the previous steps.

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
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.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
6. Pull out the condensing unit from
the base of the cabinet.
7. The condensing unit can be
removed all the way out for
easier service.
5. Remove the two screws that holds in
place the evaporation pan bracket to
the cabinet base using a 1/4” socket
screwdriver. Proceed to remove the
evaporation pan from the
condensing unit compartment.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
8. Disconnect the Tyco electrical
connector of the condenser fan
motor.
9. Unscrew the two screws that hold in
place the base motor to the rails using
a Phillips screwdriver # 2
10. Pull out the condenser fan.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to Replace Condenser Fan Motor
11. Remove the bolt that hold in
place the fan blade to the fan
motor using a 9/32” socket
screwdriver.
12. Unscrew. the two screws that
hold in place the base motor to
the fan motor using a 9/32”
socket screwdriver.
13. 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.
Fan Guard
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.

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 the
connectors located in
the back of
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.
3. Disconnect the
connector of the
ambient sensor
located on the back of
the thermostat, shown
in the picture.
4. Unscrew the two screws
that hold the wires in
place of the ambient
sensor using a precision
flat blade slotted
screwdriver.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to replace Ambient Sensor.
5. Unscrew the four screws that hold in
place the fan guard on the air baffle
using a Phillips screwdriver # 2.
Fan Guard
6. Remove the bolt that hold in place
the fan blade to the fan motor
using a 9/32” socket screwdriver.
7. Pull out the ambient sensor from its
plastic clip support.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
Instructions to replace Ambient Sensor.
8. 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 thermostat.
9. 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.

DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
1. Unscrew the four screws
that hold in place the
front grill , using a
Phillips screwdriver # 2
Instruction to Replace Starting Relay, Overload Protector and Starting Capacitor.
2. Pull out the front grill.
3. Disconnect the Tyco
electrical connector of
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.