Hoshizaki KM-1301SRH-E Ice Maker User Manual


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46
G. Diagnostic Charts
Before consulting the diagnostic charts, check for correct installation, proper voltage per unit
nameplate,andadequatewatersupply.CheckCBusingthestepsin"IV.B.ControlBoard
Check."CheckthedipswitchsettingstoassurethatS4dipswitch3,4,7,8,9,&10and
S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, & 6 are
cleaningadjustmentsandthesettingsareexible.Forfactorydefaultsettings,see"II.C.3.a)
DefaultDipSwitchSettings."
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply a) Off, blown fuse, or tripped breaker.
b) Not within specications.
2. Main Transformer (230V/115V) a) Coil winding open or shorted.
3. Water Supply a) Water supply off or improper water pressure.
b) External water lters clogged.
4. Thermostatic Bin Control.
See"IV.C.1.ThermostaticBin
ControlCheck."
a) Tripped with bin lled with ice.
b) Ambient temperature too cool.
c) Set too warm.
d) Bulb out of position.
e) Bad contacts.
5. Fuse (Control Box) a) Blown.
6. Control Switch a) Bad contacts.
7. High-Pressure Switch a) Bad contacts.
b) Dirty air lter or condenser.
c) Ambient or condenser water temperature too warm.
d) Refrigerant overcharged.
e) Fan not operating (air-cooled and remote air-cooled models).
f) Refrigerant lines or components plugged.
g) Condenser water pressure too low or off (water-cooled model).
h) Headmaster (C.P.R.) open (remote condenser unit).
8. Control Transformer
(115V/10.5V)
a) Coil winding open or shorted.
9. Control Board
See "IV.B.ControlBoardCheck."
a) In alarm.
b) Defective.
10. Mechanical Bin Control
See"IV.C.2.MechanicalBin
ControlCheckandCleaning."
a) Tripped with bin lled with ice.
b) Actuator does not move freely.
c) Defective.
11. Thermistor
See"IV.E.ThermistorCheck."
a) Leads shorted or open.
12. Hot Gas Valve a) Open in freeze cycle.
b) Closed in harvest cycle.
13. Inlet Water Valve a) Mesh lter or orice clogged.
b) Coil winding open.
c) Open in freeze cycle.
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