Turbo Air TGM-69R Service Manual page 94

ELECTRONIC CONTROLLER INSTRUCTION
No Control Function Control Objects
3 Turbo
Freeze
4 Determination
Of
Defrost
5 Defrost
Function
Compressor
6. If you press the Turbo Freeze button during the defrost mode,
Evap-Fan Motor
display panel displays Turbo Freeze mode but actually The Turbo
Con-Fan Motor
Freeze mode will start after defrost mode is completed.
LED 7. If defrost mode occurs during the Turbo Freeze mode, the defrost
mode will start after the Turbo Freeze mode is completed
1. Defrost mode is controlled by a time interval setting.
2. The time interval setting can be set by shifting dip s/w on the PCB
board.
3. The time interval setting is as follows.
NO.1
0
1
0
1
4. Factory setting is to defrost every 8 hours ( see the above picture.)
5. The first defrost mode will start at half of time interval setting of when
unit was plugged-in.
Heater
1. Defrost step
Compressor
Evap-Fan Motor
Comp.
Con-Fan Motor
F-fan motor
C-fan motor
Heater
Max time 30 min.
A. Pre-Cool Step
a. It prevents from extreme temperature rise during defrost mode.
b. Comp. Con-Fan Motor and Evap-Fan Motor run continuously
during pre-cool step.
c. 88 LED indicates inside temperature.
d. If F-sensor is sensing lower temperature than (-22)˚F(-30˚C) or
pre-cool step interval reach in 30 minutes, pre-cool step goes off.
e. Turbo Freeze mode is only one time prior to pre-cool step.
B. Heater defrost step
a. The defrost heater is energized.
b. 88 LED displays 'dF'
c. The defrost heater warms the evaporator coil thereby melting all
frost that accumulated during the previous refrigeration cycle.
e. When D-sensor is higher than 47˚F(8˚C...), heater goes off.
Contents
Turbo air
Long Beach, CA
T.F. FAN DOOR
Dip Switch
NO.2 Cycle time(hours)
0 12
0 10
1 8
1 6
Pre-cool Heater
on off
on off
on off
off on
40 min.
If D-sensor temperature
is over 50˚F, heater
goes off.
If D-sensor is in error,
heater goes off
automatically 40 min
after activated.
92
TEMPERATURE
LAMP POWER
TURBO FREEZE
Pause Fan Delay
off
off
off
off
3 min. 5 min.
If D-sensor
temp. lower
than 14˚F,
then F-fan
turns on
immediately
Remark
on
off
on
off