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Actions at the time of Failure
Replacing the Compressor
Before replacing the compressor, refer to the Engineering Service Manual "Compressor Replacement Procedure"
Caution
(1) Be sure to shut off the ground fault protector. (Operation switch OFF does not shut off the crankcase heater.)
(2) Connect compressor terminals U, V, and W with each lead wire as connected before. (For avoiding phase
inversion)
U ―Red, V ―White, W ―Blue
(3) Install the crankcase heater at the specifi ed position tightly contacting the compressor.
(4) Apply evacuation from both the high pressure and low pressure service valves.
Method of Clearing Alarm History
Operate the rotary switch (knob) and DIP switch.
(1) Align the rotary switch (knob) with [DIS]. (Discharge gas temperature is displayed)
(2) Turn ON the DIP switch SW13-7.
(3) Press ▼ button. (Entire content of [Alarm History] is cleared.)
(4) Turn OFF the DIP switch SW13-7.
(5) Align the rotary switch (knob) with [Alarm History] and confi rm that [E - - -] is displayed, indicating that the content
has been cleared.
(6) Set the rotary switch (knob) back to [OPERATION] position.
EN - 42
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