Movincool Classic Plus 14, Service Manual

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ELECTRICAL SYSTEM
18
8. Automatic Restart After Power Interruption
The program within the microprocessor of the Classic Plus 14 contains a feature that will automatically
restart the unit after power is lost and then regained. The unit also has memory in order to return itself
back to the operating mode (including temperature set point) it was in prior to the loss of power.
9. Compressor Protection
There is a Time Delay program within the microprocessor. This prevents a heavy load from being applied
on the Compressor Motor when restarting the unit (Cool Mode) after a very short period of time. This
“delay” is in effect any time when the compressor is turned on by either the “Cool On/Off” button,
temperature set point (thermostatic control), power interruption restart or Condensate Pump (optional)
operation.
Time Delay Program Specifications: 120 ± 10 sec.
10. Temperature Control
The compressor operation (Cool Mode) is controlled by the microprocessor which receives input signals
from the room temperature thermistor (evaporator inlet air) and the setting of the Temperature Set Point.
The Temperature Set Point (desired room temperature) can be adjusted by pressing the
▲
/
▼
buttons
on the Control Panel. The adjustment range of the Temperature Set point is 70˚F to 95˚F (21.1˚C to 35˚C).
11. Fan Mode Control Switch
The fan motor operation is controlled by relays on the relay board through a microprocessor in the
control panel assembly. The fan program in the microprocessor can be changed by a DIP-Switch on the
left side of the Relay Board located in the Control Box. There are two settings:
A. Cool to Stop
When the DIP-Switch is set to the “Down” or “Stop” position, the microprocessor controls the fan
motor using the same room temperature thermistor that it uses to control the compressor. In this
case, both the fan and the compressor stop when the microprocessor receives a sufficiently low
intake air (room temperature) signal from the thermistor (equal to or less than the set point). When
the temperature increases (exceeds the set point) the microprocessor will restart the fan and com-
pressor automatically. However, if the unit has been off for less than 130 sec., the fan will start
before the compressor (time delay feature).
B. Cool to Operate
When the DIP-Switch is set in the “Up” or Operate position, the microprocessor controls the fan
operation using control panel inputs only. The fan will operate continuously during Fan Only and
Cool Modes. (This is the factory default setting.)
12. Temperature Scale Display Switch
When the DIP Switch is set in the “down” or ˚C position, the Set Point Temperature will be displayed in
degrees Celsius. The LED that indicates ˚C will also be illuminated.
When the DIP Switch is set in the “Up” or ˚F position, the Set Point Temperature will be displayed in
degrees Fahrenheit.. The LED that indicates ˚F will also be illuminated. (This is the “Factory Default”
setting.)