Hoshizaki FM-300AFE-HC, Service Manual

iii 

 [h] 

BELT 

HEATER ------------------------------------------------------------------------------------25 

 [i] 

REMOVABLE FLANGE --------------------------------------------------------------------------25 

  [j] SOCKET HEAD CAP SCREW -----------------------------------------------------------------25 
4. WATER CIRCUIT -------------------------------------------------------------------------------------26 
  [a] RESERVOIR (WATER TANK)-----------------------------------------------------------------26 
 [b] 

FLOAT 

SWITCH ----------------------------------------------------------------------------------26 

 [c] 

CONTROL 

WATER VALVE --------------------------------------------------------------------26 

  [d] FLUSH WATER VALVE -------------------------------------------------------------------------27 
  [e] DRAINING ICEMAKER IN SUBFREEZING CONDITIONS ----------------------------27 
5. REFRIGERATION CIRCUIT------------------------------------------------------------------------28 
 [a] 

APPLICABLE PARTS----------------------------------------------------------------------------28 

  [b] SERVICE INSTRUCTIONS --------------------------------------------------------------------28 
 [c] 

REFRIGERANT -----------------------------------------------------------------------------------28 

 [d] 

COMPRESSOR -----------------------------------------------------------------------------------28 

 [e] 

EVAPORATOR CASING------------------------------------------------------------------------29 

 [f] 

CONDENSER --------------------------------------------------------------------------------------29 

  [g] CONDENSER COOLING FAN MOTOR ----------------------------------------------------29 
 [h] 

DRIER -----------------------------------------------------------------------------------------------29 

 [i] 

THERMOSTATIC 

EXPANSION VALVE -----------------------------------------------------29 

6. ELECTRIC CIRCUIT ---------------------------------------------------------------------------------30 
  [a] BASIC OPERATION -----------------------------------------------------------------------------30 
 [b] 

TIMING CHART -----------------------------------------------------------------------------------30 

 [c] 

SEQUENCE ----------------------------------------------------------------------------------------33 

 [d] 

OPERATION BOARD----------------------------------------------------------------------------45 

 [e] 

CONTROLLER BOARD -------------------------------------------------------------------------45 

 [f] 

SURGE 

ABSORBER------------------------------------------------------------------------------46 

 [g] 

CAPACITOR 

- XY FILTER----------------------------------------------------------------------46

  [h] BIN CONTROL SWITCH------------------------------------------------------------------------46 
 [i] 

CHUTE 

SWITCH -----------------------------------------------------------------------------------47 

  [j] DEICING HEATER (BELT HEATER) ---------------------------------------------------------47 
7. OPERATION BOARD --------------------------------------------------------------------------------48 
  [a] USER OPERATION ------------------------------------------------------------------------------48 
 [b] 

SERVICE 

OPERATION -------------------------------------------------------------------------48 

8. PROTECTORS ----------------------------------------------------------------------------------------52 
 [a] 

INDICATION ---------------------------------------------------------------------------------------52 

 [b] 

PROTECTORS ------------------------------------------------------------------------------------52 

9. ERROR CODES ---------------------------------------------------------------------------------------55 
10. PERFORMANCE DATA ---------------------------------------------------------------------------57 
 [a] 

FM-481AGE-HC -----------------------------------------------------------------------------------57 

 [b] 

FM-481AGE-HCN---------------------------------------------------------------------------------58 

 [c] 

FM-300AFE-HC -----------------------------------------------------------------------------------59 

 [d] 

FM-300AFE-HCN ---------------------------------------------------------------------------------60 

 
IV. SERVICE DIAGNOSIS -----------------------------------------------------------------------------61 
1. NO ICE PRODUCTION ------------------------------------------------------------------------------61 
2. LOW ICE PRODUCTION----------------------------------------------------------------------------63 
3. OTHERS-------------------------------------------------------------------------------------------------63 
 
V. REMOVAL AND REPLACEMENT OF COMPONENTS-------------------------------------65