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4
4.5 Cooling and heating operation
The indoor unit of the intelligent inverter centralized air
conditioner can be controlled solely, but the indoor unit in the
same system can not run cooling and heating at the same time.
When the Cooling and Heating operation confront with each
other, the Indoor Unit which are running on Cooling Mode would
stop and there will be Standby or No Priority displayed in the
Control Panel. Those Indoor Units which are running on Heating
Mode will run continuously.
If the Air Conditioner Administrator has set running mode,
then the air conditioner can not run on modes other than the
presetted.Standby or No Priority will be displayed in the Control
Panel.
4.6 Features of heating operation
Warm air will not be blown out immediately at the beginning of
the heating operation, 3~5 minutes ago (depends on the indoor
and outdoor temperature), until the indoor heat exchanger
become hot, then blows out warm air.
During operation, the fan motor in the outdoor unit may stop
running under high temperature.
During Fan Operation, if other Indoor Units are running on
Heating Mode, the fan may stop in order to prevent sending
heat wind.
4.7 Defrost in the heating operation
During heating operation, outdoor unit sometimes will frost. To
increase e󰀩ciency, the unit will start defrosting automatically
(about 2~10 minutes), and then water will be drained out from
outdoor unit.
During defrosting, both the fan motors in the outdoor unit and
indoor unit will stop running.
5. MALFUNCTION CODE OF OUTDOOR UNIT
Table 5-1 (8KW)
No. Fault or protection type Recovery mode Error code
1 Module board stop abnormally Recoverable EE
2 Communication error between indoor and outdoor unit Recoverable E2
3Outdoor heat exchanger temperature sensor (T3) error or outdoor ambient
temperature sensor (T4) error Recoverable E4
4 Input voltage protection Recoverable E5
5 DC fan protection Recoverable E6
6 Discharge pipe temperature sensor error Recoverable E7
7 EEPROM mismatch Unrecoverable E9
8 Compressor parameters mismatch Unrecoverable E.9.
9 E6 error occurs more than six times in an hour. Unrecoverable Eb
10 PFC error (reserved) Recoverable EF
11 Heat exchanger temperature sensor(reserved) Recoverable EH
12 Cooling ambient temperature is below -5 degrees Celsius Recoverable EP
13 Communication fault between main board and module board Recoverable H0
14 M-Home mismatch (reserved) Recoverable HF
15 L0 error occurs three times in one hour. Unrecoverable H4
16 Number of indoor units decreased or increased error Recoverable H7
17 IPM module protection Recoverable L0
18 DC bus low voltage protection Recoverable L1
19 DC bus high voltage protection Recoverable L2
20 MCE error (reserved) Recoverable L4
21 Zero speed protection Recoverable L5
22 Phase sequence error Recoverable L7
23 Compressor over-current protection Recoverable LA
24 Compressor current sampling circuit fault (reserved) Recoverable LC
25 Compressor start-up error (reserved) Recoverable LH
26 Radiator surface high temperature protection Recoverable PL
27 System high voltage protection (reserved) Recoverable P1
28 System low voltage protection Recoverable P2
29 Over-current protection Recoverable P3
30 Discharge temperature (T4) protection Recoverable P4
31 Outdoor heat exchanger temperature(T3) protection Recoverable P5
32 Typhoon protection Recoverable P8
33 T2 indoor unit evaporator temperature protection Recoverable PE
6


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