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Only for training and service purposes
Part 2 Functions & Controls
5.5 Automatic defrost Heatpump Only
5.5.1 9,12kBtu/h Model
• While in heating mode operation, in order to protect the evaporator pipe of the outdoor unit from freezing,
the unit is reversed to the cooling cycle to defrost the evaporator pipe of the outdoor unit.
• Defrost control is available 40 minutes after the heating cycle started and the difference of the pipe
tem-perature of outdoor unit reaches above option 1.
• The defrost control is available without reference to heating operation time only if the pipe temperature of
outdoor unit reaches below option 2.
Setting Freq.
Operating
Freq. Of
Comp
(Comp off
Inapplicable.)
4-Way
Indoor
FAN
Indoor
FAN
Pre-Heat
LED
5sec
5sec
Minimum Time
Of Heating
Main Deice time
30sec
10sec
1min
ON
OFF
Hi Speed
ON
Setting
Speed
Hot
Start
OFF
Super low speed
° low speed
ON
OFF
OFF
Deice STEP 0123456
EEV
Open step
The Degree
of Superheat
Control
Starting Step
off
Min
Step 3
300
off
Step 5
Min
off
15sec
Min
Min
Operating
Freq. Of
Comp
(Comp off
Applicable.)
Step 3
Step 5
Setting
Speed
Setting
Speed
Setting Freq.
Setting
Freq.
>5>5>5
-25-25-30-30Option 2
Expected heating operating time
And Heating operating time 40 minutes
The minimum Time of
Heating(sec)
>4Option 1
-10˚C(14˚F) less than
0˚C(32˚F) more than-10~-5˚C(14~23˚F) between
-5~0˚C(23~32˚F) between
The mean outdoor
temperature
Model (kBtu/h) Compressor Frequency EEV
9 65Hz(Step 5) 300
12 80Hz(Step 5) 300