Service manual

EElleeccttrroonniicc CCoonnttrrooll
3-3
NNoorrmmaall OOppeerraattiioonn
The user can select any temperature setting from -10°F to 10°F (-24°C to -12°C). Press the plus (
++))
key to
increment or the minus (
--
) key to decrement the temperature setting by one degree each key press. If a key
is not pressed within 3 seconds, the confirmation tone sounds and the set temperature blinks once before
changing to the new temperature setting. The display turns off 10 seconds later.
If the temperature display is OFF, the first press of
++
or
--
key displays the current temperature setting. Then
pressing the
++
or
--
will change the current setting. If the temperature display is ON, the first press of the
++
or
--
will change the current setting by one degree.
The OFF setting is the position past the 10°F setting. A confirmation tone is sounded when switching to OFF
position. In the OFF position, all functions (compressor, defrost, and alarms) will be disabled except the light
control. When a temperature alarm condition is present and the set temperature is changed to the OFF
setting, the visual and audible alarms end.
TTeemmppeerraattuurree DDiissppllaayy
Press the
tteemmpp ddiissppllaayy
key to toggle temperature display ON or OFF. The default setting is OFF.
The acceptance tone sounds when the option is changed. The "FREEZER TEMP" LED on the display is
always ON.
TTeemmppeerraattuurree SSccaallee
Press and hold the
tteemmpp ddiissp
pllaayy
key for 3 seconds to switch between degrees F and degrees C. The
confirmation tone sounds after the 3 seconds. Initial default setting is Fahrenheit. Temperature displayed is
rounded to the nearest whole number.
If the temperature display is OFF, the display turns on and displays the set temperature and the change in
temperature scale. The display returns to OFF state after 3 seconds. If the temperature display is ON, the
temperature scale change is visible.
FFaasstt FFrreeeezzee
Engagement of the fast freeze function turns the compressor on for 72 hours. The fast freeze LED is enabled
when fast freeze is engaged and the acceptance tone sounds. The
ffaasstt ffrreeeezzee
key toggles the state ON or
OFF. The set temperature is displayed if temp display state is ON. The user is allowed to change the set
temperature while in fast freeze mode. The new set temperature will be used when the fast freeze cycle is
complete. Defrost will function normally during fast freeze. Fast freeze will not engage if the temperature
setting is "OFF". If fast freeze is activated during defrost, the LED will turn on but the compressor will not
come on until after the defrost cycle is completed. The freezer returns to the previous temperature setting
after the 72 hours. Manual defrost is not available while in fast freeze mode.
CCoonnttrrooll LLoocckk
Press and hold the
ccoonnttrrooll lloocckk
key for three seconds to activate or deactivate the freezer control lockout
feature which prevents user key entries. After the three seconds, the confirmation tone sounds and the
control lock LED will be displayed indicating that the control is locked. If a key is pressed while locked, the
control lock LED will flash twice and the invalid tone will sound. If an alarm occurs while in the locked mode,
the mute sounds key will be enabled to mute the alarm. When the lockout is deactivated, the control lock
LED will turn off.
MMuuttee SSoouunnddss
The
mmuuttee ssoouunnddss
key will enable or disable the audible sounds, i.e. key acceptance and confirmation tones.
The default state is mute sounds OFF and the corresponding LED is OFF. When you press
m
muuttee ssoouunnddss
to
enable mute feature, the acceptance key tone does not sound. When you press
mmuuttee ssoouunnddss
to disable mute
option, the acceptance key tone does sound. When you turn ON the mute sounds, the mute sounds LED
turns ON and all tones except alarms are eliminated. When the tones have been muted, the audible alarms
will still operate normally. The mute sounds key is also used for muting audible alarms.