Sharp SV2414 Maintenance Manual page 46

PRECISION MACHINE TOOLS
Condition
1. LED burnt
Power lamp 2. PC board fuse blown
is off 3. Transformer burnt
4. Wire 18,19 loose connection
1. 3 phase power reverse value 3 phase
REV is lighted
2. Pressure reduction and differential
1. Inlet oil pipe is clogged or loosened
2. Inlet & outlet are reversed
3. Pump motor runs reverse
4. Pump can not run
OPS is lighted 5. Circulation oil is not enough
6. Oil filter is dirty
7. Oil pressure switch breakdown
1. Overload relay is off
PUMP is lighted 2. Pump switch is off
3. Inlet pipe is clogged
1. Overload relay off
COM is lighted
2. Compressor breakdown
1. Condenser is too dirty
2. Air filter is not clean
3. Cooling fan doesn't run or blades fall.
4. Cooling medium pressure switch
HP is lighted
5. Cooling medium is leaking
RA is lighted 1. Room temp. sensor breakdown
RO is lighted 1. Oil temp. sensor breakdown
1. Oil temp. is to high
2. Temp. sensor blown
OT is lighted
3. Check cooling medium is enough or not.
Cause
is above ±10%
breakdown.
1. Replace PC board
2. Replace fuse
3. Replace transformer
4. Reconnect wire 18,19
1. Switch any 2 of the R.S.T wires
2. Stability power source
1. Check, clean and lock pipe
2. Correct position of in/outlet
3. Check over-relay of 51p red
and white lines.
4. Replace oil pump
5. Supply circulation oil
6. Replace new filter
7. Adjust oil pressure switch DIFF,
0.3 kgf/cm² range 0.8~0.8 cmHg
1. Reset switch
2. Reset pump switch
Clean pipe and replace oil filter
1. Reset switch
2. Replace compressor
1. Use compress air to clean fins
and restart cooler.
2. Clean filter.
3. Lock fan blades tightly or replace
fan motor.
4. Replace cooling medium
pressure switch.
5. Irrigate cooling medium.
1. Replace RA sensor
1. Replace RO sensor
1. Stop running cooler until oil temp.
returns to normal range start again
2. Replace temp sensor.
3. Supply cooling.
46
Ver 1 Maintenance Manual
Remedy