Grindmaster 850 Manual De Usuario

A)

B)

C)

Overfilling of water tank when power is of

f.

Overfilling of water tank only when power to unit is on.

Auto refill fails to fill water t

ank.

PROBLEM

IV)  

T

rouble Shooting 

Auto Refill, Low W

ater Cutof

f, and Dual

Level Control System

POSSIBLE CAUSE

SER

VICE CHECK

REMEDY

1)

2)

1)

2)

3)

4)

1)

2)

Fill solenoid valve leaking due to dirt or scale holding valve open, or worn plunger seat.

Fill solenoid valve inst

alled backwards.

High electrode coated with scale, or faulty

.

Missing or faulty  common connection for electrode circuit (“C”  terminal to met

al 

enclosure).

Fill valve connected to “HEA

T”

terminal.

Dual Level printed circuit board faulty

.

No power at equipment.

No water at equipment.

V

isual.  W

ater entering

tank continuously

, and

usually slowly

.

V

isual.

Jumper from “HI”

terminal

to met

al enclosure stop

s

fill.

Jumper “C” terminal (next to XL) to met

al 

enclosure stop

s fill.

V

isual.

Jumper from “HI”

to “C”

does not stop fill.

Nothing operates on machine.

“Crack” fitting at  water inlet for pressure check.

Disassemble and clean out.  May require new plunger assembly

.  Caution

is advised to avoid damage to valve. See valve instruction sheet.

On valves without integral strainer:

Inst

all so that port marked “IN” is

connected to out

side fresh water

supply

.

On valves with integral strainer:

Inst

all so that arrow point

s in

direction of t

ank, away from fresh

water supply

.

Remove electrode assembly

.  Clean both

electrodes.  If still no remedy and connections are good, replace assembly

.

Make good secure connection.  May  require cleaning or replacement.

Connect “BLACK”

wire lead to “FILL”

terminal.

Replace Dual Level Control.

Make sure main switch(es), fuse(s), circuit breaker(s) provide power to unit, that machine’

s circuit

breaker is OK

and power switch, if

provided, is on.

Make sure all water supply line valves are open.