[D] Fault Diagnosis [D] Fault Diagnosis - Hoshizaki IM-240DME Service Manual

[d] FAULT DIAGNOSIS [d] FAULT DIAGNOSIS
Check the status of the Service Lamp on the Controller Board (LED-5, See "[c] SEQUENCE") Check the status of the Service Lamp on the Controller Board (LED-5, See "[c] SEQUENCE")
by removing the Control Box Cover. by removing the Control Box Cover.
Lamp ON - Water Plate closed Lamp ON - Water Plate closed
This tends to indicate the Back-up Timer has stopped machine operation during the freeze This tends to indicate the Back-up Timer has stopped machine operation during the freeze
cycle. High ambient and water temperatures are an obvious cause. But check out each cycle. High ambient and water temperatures are an obvious cause. But check out each
component that could result in an extended freezing time (See guide below). component that could result in an extended freezing time (See guide below).
Lamp ON - Water Plate open Lamp ON - Water Plate open
The Timer has stopped the machine because of an excessive defrost time. See the guide The Timer has stopped the machine because of an excessive defrost time. See the guide
below to check out the probable cause. below to check out the probable cause.
Lamp flashing ON/OF Lamp flashing ON/OF
If on the first cycle, check out the Cam operation and/or Toggle Switch. If the machine has If on the first cycle, check out the Cam operation and/or Toggle Switch. If the machine has
been in service for some time, the Controller Board may be at fault. been in service for some time, the Controller Board may be at fault.
REMEMBER: : Hoshizaki controllers are very reliable. They also control every component's REMEMBER Hoshizaki controllers are very reliable. They also control every component's
operation. So if a component malfunctions, the controller will respond. operation. So if a component malfunctions, the controller will respond.
Do not replace controllers in an attempt to shorten the diagnostic process Do not replace controllers in an attempt to shorten the diagnostic process
and not before carefully checking the actual fault and possible cause. and not before carefully checking the actual fault and possible cause.
When the icemaker stops, the Controller Board Interlock Indicator shows possible faults. When the icemaker stops, the Controller Board Interlock Indicator shows possible faults.
INTERLOCK INTERLOCK
PATTERN PATTERN
INDICATOR INDICATOR
1 1
Flashing Flashing
WATER TANK WATER TANK
POSITION POSITION
(1) (1)
Lever Lever
Only Only
First First
Cycle Cycle
(2) (2)
(3) (3)
OR OR
(4) (4)
18 18
POSSIBLE CAUSE POSSIBLE CAUSE
Actuator Toggle Switch Actuator Toggle Switch
Lever bent Lever bent
Cam Arm (A) broken Cam Arm (A) broken
Cam Arm Cam Arm
Defective Actuator Defective Actuator
Motor Motor
Defective Controller Defective Controller
Board Board
REMEDY REMEDY
Replace Actuator Replace Actuator
Toggle Switch Toggle Switch
Replace Replace
Replace Replace
Replace Replace
E1CG4880210 E1CG4880210