Hoshizaki KM-900MAF Service Manual page 24

3) Drain Timer
The Drain Timer is factory-adjusted, and no adjustment is required.
Dip Switch
No. 3
OFF
ON
OFF
ON
T1: Time to drain the Water Tank
T2: Time to restrain defrost completion
4) Drain Counter
Do not adjust the Drain Counter, or the Evaporator may freeze up.
The Drain Counter is factory-adjusted to drain the Water Tank every 10 cycles, and no
adjustment is required. However, where water quality is bad and the icemaker needs a
pump drain more often, the Drain Counter can be adjusted as shown in the table below:
Dip Switch
No. 5
OFF
ON
OFF
ON
SETTING
Dip Switch
No. 4
OFF
OFF
ON
ON
SETTING
Dip Switch
No. 6
OFF
OFF
ON
ON
T1
10 seconds
10 seconds
10 seconds
20 seconds
CAUTION
every cycle
every 2 cycles
every 5 cycles
every 10 cycles
24
TIME
T2
150 seconds
180 seconds
120 seconds
180 seconds
FREQUENCY