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Viking VCSB5481 Series Technical Information

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Alarms

Power

Loss

Alarm

After

power

is

initially

applied

to the unit,ifa

power

loss

is

experienced,

thetemperature (7

segment

display

characters)

andthe

"POWER"

indicator on the

LED

display will

flash

(1 sec. on and 1sec. off).

All

other indicators will be

off.

Press

and

release

the

"ALARM

OFF"

pad,

this

will

turn the

"POWER"

indicator

offandthecurrent

temperature

will

be

displayed.

Door

Open

Alarm

Jf

the control

senses

that a door is open for a period of time equal to the DOOR OPEN

DELAY

(factory

set

to 3 min

utes), the controller invokes an alarm

tone

that

beeps

continuously with a pattern of

330ms

on,

250ms

off,

300

ms

on,

1250ms

off,

and

"DOOR"

indicator

illuminates.

1. Turn off Door Open audible alarm by pressing Alarm Off pad or by closing door

2. Deactivate Door Open audible alarm by pressing Activate Controls pad and then

press

and hold Alarm Off pad

for

3

seconds.

3. Door alarm

delay

can

be

adjusted

in

Program

Mode

B.

High

Temperature

Alarm

Whenthe controllerdetectscritical temperature in either the refrigerator

(above

50deg F)or freezer (above 15deg F ) for a du

ration of 2 hours, an Alarm willsound ( 1sec. on and 1sec. offcontinuously ). The

"HIGFI

TEMP" indicator on

LED

willcome

on and

"REFRIGERATOR"

or

"FREF2ZER"

indicator on

LED

will

flash

(1

sec.on and 1sec. off) to accompany the audible alarm.

1. Alarm

tone

stops

if

temperature(s)

falls below levels indicated

above.

2.

The

indicators will

continue

to

display

as

described

above

until

"ALARM

OFF"

pad

is

pressed

and

released.

Thermistor

Alarm

When the controller detectsan open thermistor,

five

beeps (300 ms on, 300 ms off) willoccur, the

LED

willdisplay "oPn"in the

temperature area and theapplicable

"REFRIGERATOR"

or

"FREEZER"

indicator willilluminate, indicating the faultythermistor

location.

When the controllerdetects a shorted thermistor,

five

beeps (300ms on, 300 ms off) willoccur, the

LED

willdisplay "Shr" in the

temperaturearea and the applicable

"REFRIGERATOR"

or

"FREEZER"

indicator willilluminate, indicating the faulty thermistor

location.

Thecontrollerwillstill maintain temperature control and defrost operations in both sections of the unit until repair is accom

plished,

regardless of whether the thermistor is open or shorted. In the section where faulty thermistor is located, unit willbe

operated as ifthe cut-out temperature is never reached, while the other section will be unaffected and operate normally.

Temperature

Control

Operation

For

any

temperature setting,outputs

will

be turned

off/on

based

on cut-in/cut-out temperature determined by

resistance

levels

of

freezer

and refrigerator thermistors.

Refrigerator

and

Freezer

Thermistor

(NTC)

Astemperature decreases.resistance increases.

As temperature increases,resistance decreases.

NOTE:

Openor

shorted

thermistor

will

result

in unit

continuing

to

cool,

the

section

containing

the

faulty

thermistor

will

never

obtaincutout and

will

continue

to try and

reach

it, thiscould

result

in

freezing

up ifnot

repaired

in a

timely

manner.