Specifications

176
ii ) Diagnosis of RefrigerantCircuit /Application
Theremight be some causes wherethe unit starts runningbut does notperform satisfactorily,i.e.insufficient
cooling. Judgement couldbemadebymeasuring temperaturedifferenceofindoorunit’sintakeand discharge air
as well as running current.
Faulty Check Cause Reme dy
Restricted
Insufficientcooling
Air
circulation
Indoor / outdoor coil dirty
(clogged)
Indoor airfilterdirty
Clean thecoil
Clean thefilter
Fanmotor malfunction
Obstructionatair inlet/
outletofindoor / outdoor
unit
Change or repairthe motor
Remove theobstruction
High cooling
load
Excessive heat source.
e.g. electric kettle
Room overcrowded with
people
Windows/doors wide
open
Remove or reduce hea tsource
Reduce nu mber of people in theroom
Close the windo ws / doors
Refrigerant
circuit
Restrictione.g.at
strainer,capillary, filter
dryer, etc.
Refrigerantshortcharge
or refrigerantleakage
Addrefrigerant.Repairleakage if detected
Repair cloggingorreplace faulty components
Compressor
Lessornocompression
(Low running current)
Replacecompressor
Satisfactory operationwithtemperaturedifferenceofair
intake &discharge of indoor unit 8°Cto 13°C. *
(*valueisfor referenceonly)