EN - 28
What Needs to be Checked before Operation
Confi rmation before Operation
(1) Please recheck if any incorrect wiring or loose wiring exists.
(2) Fully open all service valves.
(3) Check that the power supply voltage is within ± 10 % of the rated voltage
(4) Check that insulation resistance is 1 M or greater.
Power Supply to the Crankcase Heater
When restarting after power shutoff of the ground fault protector, crankcase heater must be turned ON for 6 hours or
longer before operating the compressor for avoiding oil-forming at starting.
(With the operation switch on the refrigeration unit side OFF, and the ground fault protector ON, wait for 6 hours or
longer before turning ON the operation switch.)
Turning the ground fault protector ON causes power to be applied to the crankcase heater. Do not
touch by hand.
Protection of High Pressure
The set value of high pressure abnormality is shown in the table below.
Refrigerant R744
Set value 11.7MPa
Caution
01OCU-CR200VF5.indd2801OCU-CR200VF5.indd28 2018/12/2815:17:122018/12/2815:17:12
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