4 Troubleshooting
Inspection of PCB
SMGB0120 rev.0 - 11/2017
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4
4.2 Inspection of PCB
The standard setting of switches, etc., on the PCB is as
Control System
chapter in the Installation and Operation Manual.
Confirm that they are being set correctly.
4.3
Confirmation of operating value of protection devices and automatic
operation devices
The activation values of protection devices are as follows:
Name
Operating value
Low/High pressure interruption device
High pressure
2.02MPa
(Manual recovery)
Low pressure
0.13MPa or below
(Electronic control)
0.01MPa or below
(Electronic control)
Overcurrent relay (for compressor)
230V Type
400V Type
RCME-40WH1
100A
48A
RCME-50WH1
130A
55A
RCME-60WH1
160A
65A
RCME-70WH1
160A
80A
Suction gas decrease prevention control
-5ºC
Compressor internal thermostat
115ºC
Control for prevention of discharge gas overheat
140ºC
Fusible plug
72ºC
Control circuit fuse
10A, 5A, 3A
Safety valve (for compressor)
2.10MPa (Diameter Ø 35mm)
The setting values of automatic operation devices are as follows.
Item (Unit)
Setting value
Notes
Time settings for startup
control
Time guard setting
min
Variable: 30 s ~ 10 min (Standard value: 30 s) (*)
Electronic
control
Startup unload
min
1 min
?
N O T E
•
(*) The operation order of the cold water circulation pump is output at the same time that chiller unit operation starts.
• Set a time that allows to ensure a flow of cold water upon activation of the cold water circulation pump.