Master Bilt WCC-23SR, Service Manual

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17
ELECTRONIC CONTROLLER INSTRUCTION
5-2. FUNCTION TABLE
No Function
Controlled
Description
Part
1 Initial Buzzer
Operation Fan
Lamp
88 LED
2 Temperature Compressor
Control Evap-Fan Motor
Con-Fan Motor
LED
3 Determination Heater
Of Function Compressor
Evap-Fan Motor
Con-Fan Motor
4 Defrost Heater
Function Compressor
Evap-Fan Motor
Con-Fan Motor
1. Buzzer will be ring with in 2 seconds when you plugged-in and turned on the
power switch.
2. 88 LED displays inside temperture.
3. If in side temperature is lower than -50°F or higher than 50°F, 88 LED displays
‘LO’ or ‘HI’ respectively
4. Compressor will be run if evaporator's temperature is higher than
38.3˚F(3.5˚C). Compressor will not run 3 minutes after plug-in.
1. This unit has lock function that prevents unauthorized person from changing the
temperature setting.
2. Keep pressing up&down buttons simultaneously for five seconds, then the lock
will be cancelled with beep sound.
3. Set the temperature setting from level 1 to level 9 by pressing the up or down
button.
* The temperature setting will be locked back automatically in five seconds after
you set.
* Factory temperature setting is level 5.
4. Buzzer rings 1 time whenever each button is pressed.
5. 88 LED will indicate real inside temperature, after your setting.
6. Compressor automatically turns on and off by F-sensor (Except error mode)
7. Compressor will not come on for 3 minutes after compressor off, even though
the F-sensor is at on point.
8. Evap. Fan Motor runs continuously except when door is opened and during
defrost mode.
9. Evap. Fan Motor will start within 3 seconds when door is closed.
10. Comp. On/off temperature(°F)
1. Defrost function is controlled by a time interval setting.
2. Time interval can be set by shifting dip s/w on the PCB board.
3. Time interval setting is as follows.
Dip Switch Cycle time
No.1 No.2 (hours)
1 1 12
1 0 10
0 1 8
0 0 6
4. Factory setting is to defrost every 6 hours
5. The first defrost function will start at half of time interval setting of when unit is
plugged-in.
1. Defrost step
Pre-cool Heater defrost Pause Fan Delay
Comp. on off off on
Evap-fan on off off off
Con-fan on off off on
Heater off on off off
Max time 40 min. 40 min. 3 min. 5 min.
If D-sensor’s temperature If D-sensor’s
is over 50˚F, heater temperature
goes off. lower than 14˚F,
If D-sensor is in error, then Eva-fan
heater goes off motor
automatically 40 min turns on
after activated. immediately
LEVEL
Comp Off
Comp On 1
-2.2
5.0
2
-4.0
3.2
3
-5.8
1.4
4
-7.6
-0.4
5
-9.4
-2.2
6
-10.3
-3.1
7
-11.2
-4.0
8
-12.1
-4.9
9
-13.0
-5.8