Hoshizaki RF28A, Руководство по обслуживанию

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Please review this manual. It should be read carefully before the unit is serviced or
maintenance operations are performed. Only qualified service technicians should service
and maintain the unit. This manual should be made available to the technician prior to
service or maintenance.
CONTENTS
I. Specifications ...................................................................................................................... 5
A. Nameplate Ratings ....................................................................................................... 5
B. Construction .................................................................................................................. 5
C. Dimensions ................................................................................................................... 5
1. RR28A, RF28A ........................................................................................................ 6
2. RR55A, RF55A ........................................................................................................ 7
II. General Information ........................................................................................................... 8
A. Sequence of Operation ................................................................................................. 8
B. Time-Temperature Control Chart .................................................................................. 9
C. Control Board .............................................................................................................. 10
1. Start-Up Delay ....................................................................................................... 10
D. Settings and Diagnostics ............................................................................................. 12
1. Adjusting the Setpoint Temperature ....................................................................... 12
2. Settings and Diagnostics Menu ............................................................................. 13
a) Defrost Interval (F0) .......................................................................................... 14
b) Setpoint Temperature Differential (F2) .............................................................. 14
c) High Temperature Alarm Delay Time (F3) ......................................................... 15
d) Low Temperature Alarm Delay Time (F4) .......................................................... 15
e) Temperature Display – °F or °C (F5) ................................................................. 16
f) Alarm History (F6) .............................................................................................. 16
g) Compressor Run Time (F7) ............................................................................... 17
h) Not in Use (F8) .................................................................................................. 17
i) High Temperature Shutoff Temperature Setting (FA) .......................................... 17
j) Not in Use (Fb) ................................................................................................... 17
3. Cabinet Temperature Correction (calibration factor) .............................................. 18
E. Perimeter Frame Heater .............................................................................................. 18
III. Service Diagnosis ........................................................................................................... 19
A. Alarm Codes ............................................................................................................... 19
1. Alarm Display Priority ............................................................................................ 20
2. Alarm Details and Countermeasures .................................................................... 21
a) High Temperature Alarm (E1) ............................................................................ 21
b) Low Temperature Alarm (E2) ............................................................................. 22
c) Defrost Alarm (E3) ............................................................................................. 23
d) High Pressure Alarm (E4) ................................................................................. 23
e) Clogged Filter Alarm (E7) .................................................................................. 24
f) Defrost Thermistor Malfunction Alarm (E8) ........................................................ 25
g) Clogged Filter Thermistor Malfunction Alarm (E9) ............................................ 26
h) Control Board Error Alarms (EA and ED) .......................................................... 27
B. Diagnostic Chart ......................................................................................................... 28
C. Thermistor Check ........................................................................................................ 32