Product Manual

6.9
Maintenance
Problem Cause Solution (go sequentially)
High discharge oil
temperature
Oil level is low
(1) Check and refill oil to correct the level (in stopped
condition).
(2) Refer to the diagnosis procedure for high oil carry-over.
(3) Arrest oil leaks.
(4) Ensure the correct grade of oil is used.
Room temperature is higher than
outside ambient temperature by
30°C (86°F)
Improve ventilation in the compressor room.
Oil cooler clogged externally
Clean the cooler assembly/pre-filter mesh (if available)
externally by first using a fibre brush and then by blowing
compressed air at 87 psi g (6 bar).
For sticky dust, remove the cooler, close all the cooler ports
with dummy plugs, and do a water-wash with soap oil.
Install the cooler pre-filter mesh.
Cooling fan rotating in wrong
direction.
Check and correct the wiring connection to the cooling fan.
Replace with the correct fan type.
Check fan motor fuse
Replace the fuse if blown.
Replace with the 2A fuse.
Cooling fan not working. Check and ensure the neutral connection is complete.
Temperature sensor malfunction
Replace the sensor.
Tighten/recrimp the connection with the adaptor.
Oil filter clogged
Replace the oil filter.
If required, replace the oil (based on the condition of oil) and
run the compressor.
Thermal valve malfunctioning Replace the thermal valve element.
Oil injection orifice chocked or
improper size
Clean the oil injection orifice.
Replace with correct size.
Air filter clogged Clean or replace the air filter.
Air–oil Separator element clogged
Verify pressure drop is less than 14.5 psi g ( 1bar).
Replace oil.
Replace separator element.
Poor quality of oil Replace oil.
Oil cooler clogged internally
Check for pressure drop across the oil cooler if less than 21 psi
g (1.5 bar).
Check and clean the cooler internally with 20L of isopropyl
alcohol + toluene mixture in the 1:1 ratio and circulate for 4
hours with external 1 HP pump.
Refit the cleaned cooler and, if required, replace oil (based on
the condition of oil) and run the compressor.