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4. Cooling mode operation
• Operating frequency of compressor depend on the difference of the temperature.
(= intake air Temp.- Compressor off Temp.
• Compressor off temp.= setting temp. -0.5°C
on temp. = setting temp. +0.5°C
• If compressor operates at some operating frequency, the operating frequency of compressor cannot be
changed within 30 seconds.
• Condition of compressor turned off
- When intake air temperature stay at the temperature between setting temp. -0.5°C and setting temp.
-1.0°C for 3 minutes continuously.
- When intake air temperature reaches below the temperature of setting temp. -1.0°C.
• Compressor 2 minutes delay
- The compressor can restart minimum 2 minutes later after compressor off.
Temp. differences
over 3.0°C
over 2.5°C
2.0~2.49°C
1.5~1.99°C
1.0~1.49°C
0.5~0.99°C
0.0~0.49°C
Model
7K Series(AC)
9K Series(AC)
12K Series(AC)
9K Series(DC)
12K Series(DC)
[The operating freq. step of comp.]
[The targeting operating freq. of comp. each model]
Step 1
35
35
30
15
15
-14-
Comp. Operating frequency
Step 7
Step 6
Step 5
Step 4
Step 3
Step 2
Step 1
Comp. Operating frequency
Step 2
Step 3
Step 4 Step 5(Fc)
41
45
56
48
62
72
40
45
55
22
32
40
28
40
53
Step 6
Step 7
64
68
78
83
90
99
61
67
72
51
54
58
66
71
76
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Table of Contents
Troubleshooting
