12
4.4 Fan motor defrosting
4.4.1 At defrosting, the compressor stops and fan motor keeps running, based on the regular time
duration (Factory default setting is 12 min.).
4.4.2 Defrosting logic:
When system detects ambient temp.
≤
13
℃
, (
Default value: 13
℃
), and compressor total running time
for
heating
(Counted from the second of compressor starts,
default value: 60 min.
) reaches 60 min, it will enter
regular defrosting mode: compressor stops and fan motor keeps running 12 min. (
Default value: 12 min.
).
Once finished, the compressor will restart to heat,
counting for total heating time will be returned to zero.
During fan motor defrosting:
If the heat pump is switched off, it will stop to run immediately;
If any error occurs and activates system protection, it will quit defrosting and stop to run;
The system will not detect low pressure protection.
4.5 Parameter query
Press
，
,
it will enter the parameter query, press or
to choose the code d0 to
d8
,
press , it will show current value. Then press again to return to parameter query interface.
When finished, shortly press to exit.
Code
Parameter
Spec.
scope
Default
Remarks
d0
Ambient temp.
-20-80
℃
Actually measured value
d1
Outlet water temp.
-20-80
℃
Actually measured value
d2
Discharge temp.
-20-140
℃
Actually measured value
d4
Compressor
ON / OFF
Actually measured value
d5
Fan motor
ON / OFF
Actually measured value
d8
Low pressure switch
ON / OFF
Actually measured value
Notice:
(1). The required sensor’s spec.: 50K for discharge temp. sensor and 5K for others, please note if users need to
replace a new one, the same spec must be selected, otherwise it will not be matched with the PCB.
(2). For the parameter c0 to c14 and H0 to H5, it is not authorized to set at end-users side, if actually needed,
please contact your supplier;
4.6 System protection
4.6.1 Compressor discharge over high protection
When the compressor runs, the system will check discharge temp., if detects it
≥
105
℃
within 5S continuously, the
system will judge it as discharge error, stop compressor and fan motor, show “E03” error code.
When discharge temp.
＜
parameter c3 (105
℃
)- 20
℃
, it will start fan motor and compressor (if remains stopped
more than 3 minutes).
If this error appears 3 times within 30 minutes, the system will lock on it, the 2 indication LED lights will flash
together, and show error code “E13”, it can be only recovered by turning off the power supply.
4.6.2 Low pressure protection
When the compressor runs for 5 minutes, if the system detects low pressure switch off within 10S continuously, it
will enter this protection and show “EL” error code. When it detects low pressure switch connected, then quites
this protection.
