intensity ICHS-420KC-5 Installation & Owner's Manual page 16

5.6 Detail description for parts in fig. 5-4
Table 5-2
No.
Detection of current of the compressor B (protection code P5)
Detection of current of the compressor A (protection code P4)
Current is not detected within the initial 5 seconds after the compressor is started up. When the current of
the compressor is detected to exceed protective value set (33A for constant speed compressor), it will be
shut down and re-started after 3 min.
T4: outdoor ambient temperature sensor (fault code E7)
T3B: pipe temperature sensor of the condenser B (fault code E6 and protection code P7)
T3A: pipe temperature sensor of the condenser A (fault code E5 and protection code P6)
1) T4: if there is one system that requires starting outdoor fans, the fans are started through electric
control of the unit. Start outdoor fan A only, start A and B gears, and control the unit through T4.
2) T3B and T3A: when the electric control of the modular unit detects the temperature of the outdoor
pipe T3A or T3B of the system exceeds the protective temperature 65 C, the corresponding system
will be shut down. And it will be re-started up, after the temperature drops below the recovery tempera-
ture 60 C. Another system will be not affected.
3) T4, T3B and T3A: when the temperature sensor is detected to suffer open circuit or short circuit, fault
alarm will occur.
● When the main unit suffer fault of temperature sensor: the main unit and subordinate units will be shut
down.
● When the subordinate unit suffer fault of temperature sensor: the unit will be shut down, but other
subordinate units will not be affected.
(reserved)
Unit outlet water temperature sensor (fault code E4)
Under refrigeration mode and heating mode, conduct adjustment according to the magnitude of unit outlet
water temperature.
Adjustment range of constant speed capability: ON and OFF.
Total outlet water temperature sensor (fault code E3)
Only the main unit is valid, and the subordinate units are invalid.
Under refrigerating mode and heating mode, conduct adjustment according to the magnitude of total outlet
watertemperature. Adjustment range: Load, stabilize, unload, Emergency Stop.
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:
Normal display
Operating mode Operating capability of the compressor B
T61 frost-proof temp
TXV opening A
● 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.
(reserved port)
Detail information
Number of online units
Unit outlet water temp
TXV opening B Operating current of system A
Outdoor ambient temp. Temp. of the condenser A
Unit outlet-water tempe Temp. of the condenser B
Operating current of system B
The last failure
O&I manual
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