Hoshizaki Km-280maf-e User manual

SERVICE MANUAL

MODULAR CRESCENT CUBER

FOR QUALIFIED SERVICE PERSON

89/336

73/23

HOSHIZAKI

NUMBER: 73089

ISSUED: JULY13,2001

KM-280MAF-E

KM-280MWF-E

KM-500MAF-E

KM-500MWF-E

KM-630MAF-E

KM-630MWF-E

REVISED: APRIL 22, 2003

IMPORTANT

Only qualified service technicians should attempt to service or maintain this icemaker.

No service or maintenance should be undertaken until the technician has thoroughly

read this Service Manual.

TEL: +44 (0) 1707322493

FAX: +44 (0) 1707322315

Hoshizaki Care Branch Offices:

Benelux

TEL: +31 (0) 206918499

FAX: +31 (0) 206918768

Germany

TEL: +49 (0) 215492810

FAX: +49 (0) 2154928128

France

TEL: +33 (0) 148137130

FAX: +33 (0) 148130992

NOTE: To expedite assistance, all correspondence/communication MUST include the following

information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem

HOSHIZAKI provides this manual primarily to assist qualified service technicians in the

service and maintenance of the icemaker.

Should the reader have any questions or concerns which have not been satisfactorily

addressed, please call HOSHIZAKI CARE for assistance.

• Please review this manual. It should be read carefully before the icemaker is serviced

or maintenance operations performed. Only qualified service technicians should service

and maintain the icemaker. This manual should be made available to the technician

prior to service or maintenance.

CONTENTS

PAGE

I. SPECIFICATIONS .................................................................................................... 5

1. KM-280MAF-E (Air-cooled)................................................................................. 5

2. KM-280MWF-E (Water-cooled) .......................................................................... 6

3. KM-500MAF-E (Air-cooled)................................................................................. 7

4. KM-500MWF-E (Water-cooled) .......................................................................... 8

5. KM-630MAF-E (Air-cooled)................................................................................. 9

6. KM-630MWF-E (Water-cooled) ........................................................................ 10

II. GENERAL INFORMATION .................................................................................... 11

1. DIMENSIONS ................................................................................................... 11

[a] KM-280MAF-E............................................................................................. 11

[b]KM-280MWF-E............................................................................................ 12

[c]KM-500MAF-E............................................................................................. 13

[d]KM-500MWF-E............................................................................................ 14

[e] KM-630MAF-E............................................................................................. 15

[f]

KM-630MWF-E........................................................................................... 16

2. CONSTRUCTION ............................................................................................. 17

[a] KM-280MAF-E............................................................................................. 17

[b]KM-280MWF-E............................................................................................ 19

[c]KM-500MAF-E............................................................................................. 20

[d]KM-500MWF-E............................................................................................ 21

[e] KM-630MAF-E............................................................................................. 22

[f]

KM-630MWF-E........................................................................................... 22

3. CONTROLLER BOARD .................................................................................... 23

[a]SOLID-STATECONTROL........................................................................... 23

[b] CONTROLLER BOARD .............................................................................. 23

[c]SEQUENCE ................................................................................................ 27

[d]CONTROLSAND ADJUSTMENTS ............................................................. 30

[e] CHECKING CONTROLLER BOARD........................................................... 34

III. TECHNICAL INFORMATION ............................................................................... 36

1. WATER CIRCUIT AND REFRIGERANT CIRCUIT........................................... 36

2. WIRING DIAGRAMS ........................................................................................ 41

3. TIMING CHART ................................................................................................ 48

4. PERFORMANCE DATA .......................................................................................50

[a] KM-280MAF-E ...............................................................................................50

[b] KM-280MWF-E ..............................................................................................51

[c] KM-500MAF-E ...............................................................................................52

[d] KM-500MWF-E ..............................................................................................53

[e] KM-630MAF-E ...............................................................................................54

[f]

KM-630MWF-E ..............................................................................................55

IV. SERVICE DIAGNOSIS ...........................................................................................56

1. NO ICE PRODUCTION........................................................................................56

2. EVAPORATOR IS FROZEN UP ..........................................................................59

3. LOW ICE PRODUCTION.....................................................................................60

4. ABNORMAL ICE..................................................................................................60

5. OTHERS ..............................................................................................................60

V. REMOVAL AND REPLACEMENT OF COMPONENTS...........................................61

1. SERVICE FOR REFRIGERANT LINES ...............................................................61

[a]REFRIGERANT RECOVERY.........................................................................61

[b] EVACUATION AND RECHARGE...................................................................61

2. BRAZING............................................................................................................62

3. REMOVAL AND REPLACEMENT OF COMPRESSOR.......................................63

4. REMOVAL AND REPLACEMENT OF DRIER .....................................................64

5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE ...............................65

6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE........................................

AND/OR LINE VALVE ........................................................................................66

7. REMOVAL AND REPLACEMENT OF EVAPORATOR........................................67

8. REMOVAL AND REPLACEMENT OF WATER-REGULATING VALVE ...................

- WATER COOLED MODEL ONLY....................................................................68

9. ADJUSTMENT OF WATER-REGULATING VALVE.................................................

- WATER COOLED MODEL ONLY....................................................................69

10. REMOVAL AND REPLACEMENT OF THERMISTOR..........................................70

11. REMOVAL AND REPLACEMENT OF FAN MOTOR ...........................................71

12. REMOVAL AND REPLACEMENT OF WATER VALVE ........................................72

13. REMOVAL AND REPLACEMENT OF PUMP MOTOR ........................................73

14. REMOVAL AND REPLACEMENT OF FLOAT SWITCH ......................................74

15. REMOVAL AND REPLACEMENT OF SPRAY TUBE(S) ......................................74

16. REMOVAL AND REPLACEMENT OF TRANSFORMER......................................75

VI. CLEANING AND MAINTENANCE INSTRUCTIONS...............................................76

1. PREPARING THE ICEMAKER FOR LONG STORAGE ......................................76

2. CLEANING AND SANITIZING PROCEDURES ...................................................77

[a] CLEANING PROCEDURE .............................................................................77

[b] SANITIZING PROCEDURE ...........................................................................79

3. MAINTENANCE ...................................................................................................80