Makino V55, Руководство по обслуживанию

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4V2A1563 (E) 9 - 19
T
ABLE
9-7
PRELIMINARY TROUBLESHOOTING
Condition Cause Remedy
Power is On, but power
LED is not On. 1. Indicator board.
2. Control circuit fuse is
blown.
1. Replace indicator board
(PCB4).
2. Replace fuse.
3. Check for short circuit in
operation circuit.
Pump runs, but no or low oil
flow with air suction noise
and loud pump noise. 1. Oil suction piping is
loose.
2. Suction strainer is
clogged.
3. Tank oil level too low.
4. Pressure loss in piping
actuates relief valve and
pump cavitates.
1. Tighten suction piping.
2. Clean suction strainer.
3. Change oil if dirty.
4. Correct cause of drop in
oil level. Add oil or use
larger diameter pipe and
shorten piping.
Pump runs, but compres-
sor does not. 1. Thermostat functioned
properly and stops
compressor.
2. Thermostat (delay timer
30 second setting) is
activated.
3. Thermostat is damaged.
4. TIMER function mode is
set to “AUTO”.
1. Set thermostat to low
temperature side, check
if compressor starts.
Compressor will not start
if oil temperature is too
low. Wait until temp.
rises.
2. Reset timer and check if
compressor starts.
3. Replace thermostat.
4. Set TIMER function
mode to “MANUAL”.
Compressor ran, but pump
and compressor stopped.
POWER and ALARM LED’s
did not come On. 1. Power is Off. 1. Check main power
source.
Abnormality occurred at the
control circuit board. 1. Fault on control circuit
board.
1. Replace control circuit
board.
Pump, compressor and fan
run, but oil is not cooled. 1. Obstacles near suction/
exhaust ports.
2. Air filter clogged.
3. Overloading.
4. Thermostat set too high.
5. Refrigerant gas low.
1. Remove obstacles.
2. Clean filter.
3. Eliminate the cause.
4. Set thermostat properly.
5. Recharge refrigerant.