Rotenso J100Wi, Service Manual

Page: 81 / 132

LCAC R32 Series
81 Service manual
PART 5. ELECTRICAL CONTROL SYSTEM
1. ELECTRICAL CONTROL FUNCTION
1.1 ABBREVIATION
T1: Indoor room temperature
T2: Middle indoor heat exchanger coil temperature
T2B: Indoor heat exchanger exhaust coil temperature
T3: Outdoor heat exchanger pipe temperature
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
1.2 MAIN PROTECTION
1.2.1 Compressor three-minute delay at restart
Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for up to
three minutes upon subsequent unit restarts.
1.2.2 Automatic shutoff based on discharge temperature
When the discharge temperature of compressor rises, the running frequency is limited according to the following
rules:
T5
Compressor off
Frequency limit1
F
E
D
C
Frequencies increase slowly
B
Normal
A
Frequency holding
Frequency limit2
T5
Compressor off
Frequency limit
Normal
Frequency holding
18K 24~60K
1.2.3 Automatic shut off based on compressor top temperature
The unit ceases operation when the compressor top temperature exceeds a pre-determined threshold. The unit will
restart after the temperature guard of the compressor top restarts.
1.2.4 Indoor Fan Delayed Open Function
When the unit starts up, the louver is immediately active. The indoor fan opens 7 seconds later. If the unit runs in
heating mode, the indoor fan is also regulated by the anti-cold wind function.
1.2.5 Fan Speed Malfunction
For Aneru (console type):
If the indoor fan speed is lower than 300 RPM for certain time, the unit stops and the LED displays the failure code.
For Nevo (duct type):
If a fault occurs on the air volume regulator or the regulator enters protection mode, it sends the error message CF
and an instruction to reduce fan speed to the master. The message and the instruction can be inquired with the
remote controller or the wired controller. (Fault and protection information are displayed for one minute). After a
fault occurs, the master unit shows the error code E3 and the fault count for one minute. If the fault occurs three
times, then the fan is unable to resolve the problem independently. External shutdown by a remote controller, wired