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O&I manual
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Detail information
5.6 Detail description for parts in fig. 5-4
Detection of current of the compressor B (protection code P5)
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
DŽ
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
DŽ
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.
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.
No.
Table 5-2
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.
(reserved)
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.
Selection code of the compressor
Reserved DIP switch
state
The diagram
denotes selection
of constant speed
compressor
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 outlet-water tempe Temp. of the condenser B
TXV opening A TXV opening B Operating current of system A Operating current of system B
The last failure
Summary of Contents for ICHS-600KC-5
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