17
I&O manual
1. Faults
When the main unit suffers faults, the main unit stops operating, and all other units also stop running;
When the subordinate unit suffers faults, only the unit stops operating, and other units are not affected.
2. Protection
When the main unit is under protection, only the unit stops operating, and other units keep running;
When the subordinate unit is under protection, only the unit stops operating, and other units are not affected.
CAUTION
27
Detail information
No.
28
29
30
Numerical code tube
1) In case of stand-by, the address of the module is displayed;
2) In case of normal operation, 10. is displayed (10 is followed by dot).
3）In case of fault or protection, fault code or protection code is displayed.
Input of transformer, 220-230V AC current. (only valid for the main unit)
Spot check. The operating status of outdoor system can be observed through spot check, and specific display
contents are as shown in the following figure:
● Display contents of “operating mode”: 1. cooling; 2. heating; 4. pump; 8. Stand-by
● Display contents of “number of online units”: the main unit can display the number of online units, and the
subordinate unit displays 0.
Normal display
Operating mode Operating capability of the compressor B Number of online units Outdoor ambient temp. Temp. of the condenser A
T61 frost-proof temp Unit outlet water temp Unit inlet-water temp Temp. of the condenser B
TXV opening A TXV opening B Operating current of system A Operating current of system B The last failure
Quick return oil solenoid valve
31 Parameter chip
32
33
34
35
Program burn in prot
Four-way valve of the system B
Plate heat exchange antifreeze and tropical
Compression electromechanical heating belt
36
Target flow switch electric heating belt control port
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