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FTC-120MNA
Hoshizaki FTC-120MNA Service Manual
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NO. T069-838
ISSUED:
MA
Y 31, 201
1
REVISED:
JUN. 16, 2014
HOSHIZAKI
UNDERCOUNTER
REFRIGERATOR/FREEZER
SER
VICE MANUAL
MODEL
RTC-M_A series
FTC-
M_A series
2
Table of Contents
Table of Contents
2
General Information
4
Safety Instructions
4
Dimensions/Specifications
6
[A] RTC-120MNA
6
[B] RTC-120MDA
7
[C] RTC-150MNA
8
[D] RTC-150MDA
9
[E] RTC-180MNA
10
[F] RTC-180MDA
11
[G] FTC-120MNA
12
[H] FTC-120MDA
13
[I] FTC-150MNA
14
[J] FTC-150MDA
15
[K] FTC-180MNA
16
[L] FTC-180MDA
17
Technical Information
18
Wiring Diagram
18
[A] RTC SERIES
18
[B] FTC-120MNA, FTC-120MDA, FTC-150MNA
19
[C] FTC-150MDA, FTC-180MNA, FTC-180MDA
20
Refrigeration Circuit
21
[A] RTC SERIES
21
[B] FTC SERIES
22
Electronic Controls
23
[A] SET POINT TEMPERATURE
23
[B] CABINET TEMPERATURE DIFFERENTIAL
23
[C] DEFROST CYCLE
23
[D] DEFROST TERMINATION TEMPERATURE
23
[E] TEMPERATURE DISPLAY
23
[F] COMPRESSOR SOFT START
24
[G] HIGH PRESSURE SWITCH
24
[H] CHECKING SET POINT TEMPERATURE
25
[I] MANUAL DEFROST
25
[J] ERROR CODES
25
Timing Chart
26
[A] STARTUP - CONTROL
26
[B] DEFROST
27
Controller
28
[A] RTC SERIES
28
[B] FTC SERIES
31
Service Diagnosis
36
Error Codes
36
Flowchart
37
[A] RTC SERIES
37
[B] FTC SERIES
39
Components
41
Controller
43
[A] SERVICING CONTROLLER
43
[B] CHECKING THERMISTOR
44
Removal and Replacement of Components
45
Refrigeration Circuit
45
[A] REFRIGERANT
45
[B] COMPRESSOR
45
[C] CONDENSER
47
[D] DRIER
47
[E] EVAPORATOR
47
Electrical Parts
48
[A] CONDENSER FAN MOTOR
48
[B] INTERIOR FAN MOTOR
49
[C] DEFROST HEATER, THERMAL FUSE
50
[D] INTERIOR THERMISTOR, DEFROST THERMISTOR
51
[E] CONTROLLER
52
[F] FUSE
52
[G] FORCED DRAIN WATER EVAPORATION PAN
52
Door Gasket
53
[A] REMOVAL
53
[B] REPLACEMENT
53
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Hoshizaki FTC-120MNA Specifications
General
Model
FTC-120MNA
Brand
Hoshizaki
Type
Refrigerator
Defrost Type
Automatic
Voltage
115V
Phase
1
Hertz
60 Hz
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