Metro T-Series Hot Food Holding Cabinets - Manual (Page 8)

8
OPERATING INSTRUCTIONS (DIGITAL CONTROLLER)
NOTE
:
Before using your cabinet for the first time, heat the cabinet to maximum temperature for 15 minutes to burn off
oils on stainless from manufacturing process. During this process slight smoke may be seen.
Power-Up and Pre-Heat
• When the cabinet is switched on, all LEDs and display segments illuminate (blinking) for 3 seconds.
• The display then shows the set point (blinking) for 3 seconds, followed by current temperature.
• The preheat indicator light turns off after the temperature set point is reached. Set point range is 85-200°F
(29-93°C) and “---” indicates one step below 85°F (29°C).
• If the set point is “---” (heat off) the pre heat LED will be off. The “heat off” LED will be on.
NOTE
:
The current temperature scale LED (°F or °C) remains illuminated whenever the cabinet is turned on.
The “element indicator” LED remains on whenever the circuit is energized.
• During initial pre-heat, the “lo temp” alarm is disabled.
• When plugged in and powered-on, the “Power” display shows the current charge status of the battery.
When charging, the uppermost led blinks in 1 second intervals, while all LEDs below it remain on continuously.
When the battery is fully charged, all power LEDs are lit continuously.
1. Allow the cabinet to pre-heat without food for 30 minutes to an hour. The pre-heat time required to reach the
temperature set point is dependent on the set point, the size of the cabinet, the door type (single or dual) and the
temperature of the room the cabinet is in.
Steady State Operation
• Press and release the “+ or –” buttons at any time to change the set points. The first push recalls and displays the
current set point. If a button is pressed again within a 4 second period, the set point will be changed by a
1 degree increment. The set point will be displayed for 4 seconds, then shows the current temperature display.
• Press and hold the “+ or –” buttons to recall and display the current set point for 4 seconds. The set point will then
change in 1 degree increments every
1 /
2
second for the first 5 seconds, then increase in 10 degree increments
every ½ second until the button is released. The set point will be displayed for 4 seconds, then shows the current
temperature display.
Unplugged Operation
• When cabinet is unplugged the system begins operation on battery power.
◦◦ Temperature◦monitoring◦and◦air◦circulation◦continues◦up◦to◦(3◦hours)◦after◦the◦cabinet◦is◦un-plugged.
◦◦ Cabinet◦displays◦are◦turned◦on◦when◦the◦cabinet◦is◦unplugged.
◦◦ If◦additional◦runtime◦is◦desired,◦press◦power◦switch◦to◦engage◦controller◦and◦fan.
• Display the current cabinet temperature: Press the “+ or –” button. The display will show the current temperature
for as long as the button is depressed. Temperature set points cannot be changed while cabinet is unplugged.
• Display the battery charge status: Press the “battery” button. The display will show the current charge level for as
long as the button is depressed.
• Low Temp Alarm: If the cabinet temperature drops below the alarm set point for more than 5 minutes during
operation, the display will begin to blink “___”, and the “LO TEMP” LED will illuminate (blinking). This will repeat
every 10 seconds.
• Hi Temp Alarm: If the cabinet is in “HEAT OFF” mode and the temperature rises above the alarm set point for
more than 5 minutes during operation, the display will begin to blink “---”, and the “HI TEMP” LED will illuminate
(blinking). This will repeat every 10 seconds.
NOTE
:
Audio (if enabled), Low temp Alarm: (3) 1 /
2
second beeps, repeating every 10 seconds.
• Average charging time = 1 hour for single cavity and 1
1 /
2
hours for dual cavity.