Diagnostic Charts; No Ice Production - Hoshizaki KM-1340MAH Service Manual

freeze with the float switch removed, replace the board.
Note: Normal freeze cycle will last 20 to 40 minutes depending on model and
conditions. Cycle times and pressures should follow performance data provided
in this manual.
6) Pump-Out Cycle (10/20 second pump out) – the compressor remains energized,
the hot gas valve energizes, the fan motor de-energizes, the pump motor stops for
2 seconds and starts in reverse rotation for 10/20 seconds. (This removes contaminants
from the water reservoir through the check valve (drain valve) and down the drain and
allows for a power flush of the float switch.) Check for clear tubing at the check valve
housing and check the unit drain for water flow. Diagnosis: If the pump motor does not
reverse, check the circuit and capacitor. If water does not pump out, remove the check
valve (drain valve) housing and check/clean the valve assembly.
7) Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.
Note: Unit continues to cycle until bin control is satisfied or power is switched OFF. (The
pump out cycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles.
The factory default is every 10 cycles.) The unit always restarts at the 1 minute fill
cycle.
B. Diagnostic Charts

1. No Ice Production

Problem
[1] The icemaker will not
start.
Possible Cause
a)Power Supply
b)Fuse (Inside fused
disconnect, if any)
c) Control Switch
d)Bin Control Thermostat 1. Tripped with bin filled
e)High Pressure Control 1. Bad contacts.
1. OFF position.
2. Loose connection.
3. Bad contacts.
4. Voltage too high or too
low.
1. Blown.
1. OFF position.
2. Bad contacts.
with ice.
2. Ambient temperature
too cool.
3. Set too warm.
4. Bulb out of position.
5. Bad contacts.
2. Dirty air filter or
condenser.
34
Remedy
1. Move to ON position.
2. Tighten.
3. Check for continuity and
replace.
4. Check and get
recommended voltage.
1. Check for short circuit and
replace.
1. Move to ICE position.
2. Check for continuity and
replace.
1. Remove ice.
2. Increase ambient
temperature.
3. See "II.C.3. Controls
and Adjustments, g) Bin
Control."
4. Place in position.
5. Check for continuity and
replace.
1. Check for continuity and
replace.
2. Clean.