Maintenance
72
21
2# low-pressure sensor
If the pressure sensor’s output exceeds the range
(0~2200kpa) for 5s
Circuit’s
emergency stop
Manual operation
22
1# high-pressure sensor
If the pressure sensor’s output exceeds the range
(0~4800kpa) for 5s
Circuit’s
emergency stop
Manual operation
23
2# high-pressure sensor
If the pressure sensor’s output exceeds the range
(0~4800kpa) for 5s
Circuit’s
emergency stop
Manual operation
33
Module’s chilled water flow fault
If there is continuous broken circuit for 2s
Module’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
module will be locked
34
Module’s cooling water flow
fault
If there is continuous broken circuit for 2s
Module’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
module will be locked
35
1# Fault of high-pressure
switch/compressor overload
If there is continuous broken circuit for 2s
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
36
1# low-voltage switch fault
If there is continuous broken circuit for 2s
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
41
Power supply protection
If there is continuous broken circuit for 2s
Module’s
emergency stop
Manual operation
42
2 # Fault of high-pressure
switch/compressor overload
If there is continuous broken circuit for 2s
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
43
2# low-voltage switch fault
If there is continuous broken circuit for 2s
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
65
Communication fault
If it is interrupted for 20 s
Module’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
[97]
Module’s chilled water outlet
temperature is too low
When module’
s chilled outflow water temperature ≤ the
low setpoint of the chilled outflow water temperature for
3s, there will be fault alarm;
When module’
s chilled outflow water temperature ≥
+6°C of the low setpoint of the chilled outflow water
temperature, the fault will be released and reset
automatically
Module’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
module will be locked
98
Module’s cooling water outlet
temperature is too high
When module’
s cooling outflow water temperature ≥ the
high setpoint of the cooling outflow water temperature
for 3s, there will be fault alarm;
When module’
s cooling outflow water temperature ≥
-6°C of the high setpoint of the cooling outflow water
temperature, the fault will be released and reset
automatically
Module’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
module will be locked
99
1# Low suction pressure
If the suction pressure < suction pressure’s low setpoint
+100kPa, the circuit’s load shall be restricted;
circuit operation within 300s;
If the suction pressure < the limit value for 60s, the
suction pressure shall be <300kPa for 10s;
circuit operation >=300s, If the
suction pressure < the limit value for 30 s, the suction
pressure shall be <300kPa for 10s. If the circuit operates
two compressors, it shall de-load a compressor in
accordance with circuit’s de-loading process.
If the circuit only operates one compressor, it shall run in
accordance with the circuit’s emergency stop process,
with alarm.
If the suction pressure >= limit value +200kPa, it will be
reset automatically
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
100
1 # Low exhaust pressure
After the circuit operation (if any compressor is turned
on) for 300s:
if the suction pressure is ≤ 650KPa, and if the exhaust
pressure is lower than 1080Kpa (the low setpoints of
exhaust pressure) for 10s;
if the suction pressure is >650KPa and if the exhaust
pressure is ≤1.8 (low protection factor of exhaust
pressure) * suction pressure -90kPa for 10s;
Circuit’s
emergency stop
Automatically; If it occurs for
three times within 1 hour, the
circuit will be locked
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
