Table of Contents
Advertisement
Section 3
Evaporator Fan Operation
When the refrigerator is initially powered up or immediately
following a power outage the unit will begin cooling after a
3-6 minute delay. During normal operation the evaporator
fan pulses independently of the compressor as dictated by
the controller as follows:
1. During the cooling mode, compressor and evaporator
fan run simultaneously.
2. During the compressor off mode, evaporator fan pulses
three minutes on and three minutes off.
3. During an actual defrost event other than the off-cycle
defrost, compressor stays off but the evaporator fan
runs continuously.
Cooling Cycle
Compressor On
Compressor Off
Evaporator Fan On
Evap Fan Cycles On
3-Min, Off 3-Min
ERC112 Temperature Control
The Maketable control assembly is located behind the
louvered door in the machine compartment.
Maketable Control Assembly
AT START UP
1. At initial start-up or anytime power is disconnected, then
reconnected to the unit, the control will go into defrost
mode.
2. The control will enter a DEFROST mode and the display
will read dEF. The compressor and condenser fan as well
Part Number: 9291545 REV00 11/20
3. The display will continue to read dEF for an additional 30
4. Then the digital thermostat will display box temperature.
5. The temperature control will cycle the compressor,
Defrost
The temperature control also monitors the evaporator
Defrost Cycle
temperature and will turn off the compressor and condenser
Compressor Off
fan motor when needed to allow accumulated frost on the
evaporator to clear. During this defrost cycle, the digital
Evaporator Fan On
temperature display will read dEF. After the defrost cycle is
complete, the temperature control will return to a normal
cooling cycle, but the display will continue to read dEF until
the evaporator returns to normal cooling temperatures (up
to 30 minutes).
The electronic temperature controller monitors evaporator
temperature and compressor run time to determine the
proper time for a positive defrost cycle. A defrost cycle
can occur as often as every 60 minutes under extremely
heavy usage. It can last a minimum of 2 minutes. When the
controller enters the defrost mode the compressor is shut
off and will remain off until the evaporator coil temperature
exceeds:
• 41°F (5°C) or the controller reaches a time limit of 75
as the evaporator fan will remain off until this initial
defrost is complete. This initial defrost cycle may take up
to 35 minutes to complete.
minutes while the cooling cycle cools the box to the set
temperature.
evaporator fan motor and condenser fan motor to
maintain box temperature at the control setting. For
more information see "Evaporator Fan Operation" on
page 13.
minutes on a refrigerated unit.
Operation
13
Hide quick links:
Advertisement
Table of Contents
