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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
Summary of Contents for CCA3U-09HRFN1-MC
Page 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Units ...
Page 9: ...6 A5 Duct Units A6 Duct Units ...
Page 10: ...7 Console Units ...
Page 11: ...8 Ceiling floor Units ...
Page 12: ...9 HESP DUCT Units ...
Page 31: ...28 Console Units 16 Drain pipe 195 Hanging arm Unit mm 700 600 210 ...
Page 38: ...35 Console Units Ceiling floor Units ...
Page 43: ...40 CFAU 09HRFN1 M C CFAU 12HRFN1 M C MCD 36HRFN1 M C MCD 48HRFN1 M D ...
Page 44: ...41 CTBU 36HWFN1 M C CTBU 48HWFN1 M C ...
Page 45: ...42 MUEU 18HRFN1 M C MUEU 24HRFN1 M C MUE 36HRFN1 M C ...
Page 46: ...43 MUE 48HRFN1 M C MUE 60HRFN1 MW ...
Page 47: ...44 MUE 36HRFN1 M C MUE 48HRFN1 M C ...
Page 48: ...45 MUE 60HRFN1 MW MTI 18HWFN1 MT0W MTIU 24HWFN1 MW ...
Page 49: ...46 MTIU 36HWFN1 MW MTIU 48HWFN1 MW MHG 60HWFN1 MW ...
Page 51: ...48 MOBA30 09HFN1 MT0W MOB30 12HFN1 MT0W ...
Page 52: ...49 MOD30 24HFN1 MT0W MOD01 23HFN1 MT0W ...
Page 53: ...50 MOD30U 36HFN1 M ...
Page 59: ...56 CTBU 09HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 60: ...57 CTBU 12HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 61: ...58 CTBU 18HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 62: ...59 CTBU 24HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 63: ...60 CTB 36HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 64: ...61 CTB 48HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4 ...
Page 74: ...71 12 Field Wiring 36K 48K 60K ...
Page 123: ...120 P U P V ...
Page 124: ...121 P W P N ...
Page 141: ...138 ...
Page 187: ...184 5 Remove the four fixing screws of the fan motor then remove the motor 5 ...