HAIER CHILLER
3
1
display [Er:08] code, the corresponding module will stop for protection;
④
When the outdoor ambient temp. sensor damage, the system [UNIT] will flash and display [Po:01]
code;
⑤
When the condenser coil temp. sensor of No.1 module damage, the corresponding module No. will
flash and display [Pr:01] code;
⑥
When the condenser coil temp. sensor of No.2 module damage, the corresponding module No. will
flash and display [Pr:02] code;
⑦
When the condenser coil temp. sensor of No.3 module damage, the corresponding module No. will
flash and display [Pr:03] code;
13.2
Heating mode
13.2.1 Enter heating mode
Control the system total return water temp.: the setted temp. of heating mode is 40
℃
;
Control the system total outlet water temp.: the setted temp. of heating mode is 40
℃
;
13.2.2 Startup procedure in heating condition
PCB will startup the unit as following procedure when PCB performs the start order from MCU, or more
than one terminal work in simultaneous control, or time of Timer ON reached.
a. Running lamp on the MCU changes from red to green;
b. Main control cooling(heating) water pump start, detect the water flow switch continually;
c. The 4-way vlave will open and enter standby state after the water flow switch working normally.
d. Module PCB upload or download by the determination of return water temp. or outlet water temp. after
the water flow switch working normally.
13.2.3 Stop procedure in heating condition
PCB will stop the unit as following procedure when PCB performs the stop order from MCU, or all
terminals stop, or time of Timer OFF reached, or stops becuause of error.
a. Running lamp on the MCU changes from green to red;
b. Compressors ordinal stop, the interval time is 5 senconds;
c. Outdoor fan motor time-delay [SC05] close when all the compressors in module have closed;
d. Cooling(heating) water pump and 4-way valve close 1 minute later.
13.2.4 Heating temp. control procedure
MCU control the start/stop of compressor by comparing the total return or outlet water temp. T
tr/o
of the
master module with the setting temp. T
s
during heating.
Control the system total return water temp.: the setted temp. of MCU is 25
℃
--45
℃
;
Control the system total outlet water temp.: the setted temp. of MCU is 25
℃
--50
℃
;
When T
tr/o
≤
T
s
- [SP01], MCU enter upload area, compressor will begain heating if it can meet the startup
protect time
≥
[EC01]; When T
tr/o
>
T
s
, MCU enter download area, compressor will standby if it can meet the
