Hoshizaki DKM-500BAH service manual LED Lights and Audible Alarm Safeties, Pm, Sr, Dv

Sequence Step

LED

Energized

Time LEDs are On

Components

Min.

Max.

Avg.

1 Minute Fill Cycle

4

WV

60 seconds

Harvest Cycle

1, 4, and 2

WV, HGV,

2 minutes

20 minutes

3 to 5 minutes

Comp

Freeze Cycle

1

Comp, PM,

5 minutes

freeze timer

30 to 35 minutes

FMS

setting

Pump Out

1, 3, and 2

Comp, HGV,

10 seconds

20 seconds

factory setting

PM, SR, DV

No. of Beeps

Type of Alarm

Notes

(every 3 sec.)

1

High Evaporator Temp.

Check for harvest problem (stuck HGV or

(temperature > 127°F)

relay), hot water entering unit, or shorted

(53°C)

thermistor.

2

Harvest Backup Timer

Orange LED marked H TIMER lights up.

(harvest > 20 min. for two

Check for open thermistor, HGV not

cycles in a row)

opening, TXV leaking by, low charge, or

inefficient compressor.

3

Freeze Timer

Yellow LED marked F TIMER lights up.

(freeze > specified setting

Check for F/S stuck closed (up), WV

for two cycles in a row)

leaking by, HGV leaking by, TXV not

Timer is factory set using

feeding properly, low charge, or inefficient

dip switches 9 & 10

compressor.

4

Short Circuit

Resistor wire harness shorted. Check

(between the K4 connec-

and replace wire harness if necessary.

tion on the control board

and the bin control)

5

Open Circuit

Resistor wire harness circuit open or

(between the K4 connec-

control board open. Check and replace

tion on the control board

component if necessary.

and the bin control)