startup protect time ≥ [EC02]; When T
a setted difference temp. [SP01] to prevent compressor from conversing ON/OFF frequently; When
+[SP02], PCB entering Emergency stop area.
13.2.5 Protection during heating state
PCB will dectect the possible failure when working and manage accordingly under heating mode.
a. Overheating protection (failure code [Pr:08])
Start conditions for overheating protection:
① If water outlet temp. of module T
② When enter overheating protection, the corresponding module No. will flash and display failure code
[Pr:08] on MCU, compressor and outdoor fan motor will stop, cooling (heating) water pump will keep
running and will stop when T
start conditions of compressor are meeted.
b. Auxiliary electric heating procedure
Auxiliary electric heating will work when all the following conditions are meeted:
① Auxiliary electric heating has been allowed by MCU (electric heating is defaulted as working when unit
② When select heat pump+ electric heating mode, outdoor ambient temp. T
③ When select heat pump+ electric heating mode, T
Electric heating will stop if any condition as the following is meeted:
① Water outlet temp. sensor damage;
② The temp. of stop condition is meeted;
③ Overheating protection.
c. Temp. sensor failure protection
① When the system total return temp. sensor damage, the system [UNIT] will flash and display [Eo:01]
- [SP01] <T
Fig. 14-2 Compreesor running diagram in heating mode
rise, when T
< [EP04]-4℃, compressor will begin heating according to the flow when the
, the compressor will keep its original state, there is
≥ [EP04], enter overheating protection;