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16.3.5 Refrigerant Leakage Detection diagnosis and solution (EC)
Error Code
EC
Malfunction conditions
Define the evaporator coil temperature T2 of the compressor
starts running as Tcool.
If the following occurs 3 times, the display shows "EC" and the
unit switches off:
In the first 8 minutes after the compressor starts up, if T2
<
Tcool
-
2
℃
is not maintained for 4 seconds and compressor
running frequency is not higher than 50Hz for 3 minutes
Potential Causes
●
Faulty T2 sensor
●
Faulty indoor PCB
●
System problems, such as leakage or blockages
Trouble shooting:
Is there cool air blowing
out from indoor air outlet?
Yes
Yes
Check the T2
sensor. Is it
securely attached?
No
Check system for leakages.
Are any leakages present?
No
Power off, then restart the
unit 2 minutes later. Does a
problem still remain?
Replace the indoor
PCB
Yes
Repair the leakage and
recharge the refrigerant
Yes
Check System for blockages
and clear blockages if present
Содержание 38QUA009DS
Страница 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Unit...
Страница 9: ...6 A5 Ducted Units A6 Ducted Units...
Страница 10: ...7 Floor ceiling Units...
Страница 11: ...8 HESP DUCTED Units...
Страница 35: ...32 6 Wiring Diagram 6 1 Indoor Unit 40QTD018DS 40QTD024DS 40QTD036DS 40QTD048DS...
Страница 36: ...33 40QSM018DS 40QSM024DS 40QSM036DS 40QSM048DS...
Страница 37: ...34 40QZL018DS 40QZL024DS 40QZL036DS...
Страница 38: ...35 40QZL048DS 40QZL060DS...
Страница 40: ...37 6 2 Outdoor Unit 38QUA018DS 38QUA024DS...
Страница 41: ...38 38QUA036DS...
Страница 42: ...39 38QUA048DS 38QUA060DS...
Страница 44: ...41 40QSM018DS Code 0 Code 1 Code 2 Code 3 Code 4...
Страница 45: ...42 40QSM024DS Code 0 Code 1 Code 2 Code 3 Code 4...
Страница 46: ...43 40QSM036DS Code 0 Code 1 Code 2 Code 3 Code 4...
Страница 47: ...44 40QSM048DS Code 0 Code 1 Code 2 Code 3 Code 4...
Страница 60: ...57 12 Field Wiring 18K 24K 36K 48K...
Страница 61: ...58 60K...
Страница 104: ...101 P U P V...
Страница 105: ...102 P W P N...