Johnson Controls YEWS Series, Installation, Operation And Maintanance Instructions

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SYS1 AI14 SENSOR FAULT
SYS1 AI15 SENSOR FAULT
SYS1 HIGH DIS.PRESSURE
SYS1 LOW EVAP.PRESSURE
SYS1 HIGH DIS.T
SYS1 HIGH CURRENT
SYS1 LOW CURRENT
SYS1 HIGH LCLT
SYS1 LOW LELT
14
15
16
17
18
19
20
21
22
System1 The discharge pressure sensor is short
circuit or break
System1 The oil pressure sensor is short circuit or break
System1 The discharge pressure exceeds the set value of
alarming
Systeml the evaporator pressure is lower than the alarming
value
Systeml the discharge temperature is higher than the
alarming value
System1 Compressor current is higher than MLA
System1 Compressor current is lower than MLA *5%
The leaving cooling liquid temperature is higher than the
The leaving chilled water temperature is lower than the
Manual
Manual
Manual
Manual
Auto
Manual
Manual
Auto
Auto
setting value
setting value
YEWS-E Water Cooling Screw Chiller/Heat Pump
5.6 Fault imformation
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Reset method Fault information Fault reason
SYS1 COMM.FAULT
SYS1 FLS OPEN
SYS1 DIS.PRESSURE SW.OPEN
SYS1 OIL SW.OPEN
SYS1 MOTOR PROTECTION
SYS1 EXT.INTERLOCK OPEN
SYS1 Y-
△
TRANSITION FAULT
SYS1 AI1 SENSOR FAULT
SYS1 AI2 SENSOR FAULT
SYS1 AI3 SENSOR FAULT
SYS1 AI4 SENSOR FAULT
SYS1 AI5 SENSOR FAULT
SYS1 AI13 SENSOR FAULT
Communication disconnection between the centralized
controller and 1# main board
Flow switch open
System1 discharge pressure switch open
System1 oil level switch open
System1 motor protection switch open
Interlock switch open
S
T
System1 The discharge temperature sensor is short circuit or break
System1 The evaporating pressure sensor is short circuit or break
Manual
Auto
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
ystem1 Star-Delta transformation failed
he leaving cooling water temperature sensor is short circuit or
break
The entering cooling water temperature is short circuit or break
The leaving chilled water temperature sensor is short circuit or
break
The entering chilled water temperature sensor is short circuit or
break
43
SYS1 LOW DIFF OIL P
SYS1 CLOGGED FILTER
SYS1 CMPS HF START-STOP
SYS1 HIGH LHLT
23
24
25
26
System1 compressor High-Frequency start-stop
output heat water temperature exceeds setting value
System1 (Oil pressure - evaporating pressure)<100kPa
System1 (Discharge pressure - oil pressure)>245kPa
Manual
Manual
Auto
Auto