Trouble Shooting - KOLDTECH SPKT-DOM-PM-914 Manual

Ice is accumulating on 1. Defrost duration is too long.
ceiling around 2. Fan delay does not activate
evaporator and/or on fan fans after defrost period.
guards venturi or blades. 3. Defrost thermostat or timer
is out of order
4. Frequently Defrosting action
Evap.Coil is not cleared 1. During defrosting, Temp of
of frost during defrost Evap. coil is lower than
cycle. freezing temp.
2. Cycle of defrost is not
enough
3. Defrost cycle too short.
4. Defective Timer or defrost
thermostat.
Ice accumulating in 1. Condensate (pan) heater is
drain pan out of order.
2. Drainpipe is clogged of ice.
3. Drain heater is out of order.
4. Timer/thermostat is out of
order
OASMs-2912-D/14/3/18
KOLDTECH
The Technology of Excellence
1. Adjust defrost termination value
2. Thermostat is not defrost, or adjusted
properly.
3. Replace defective component.
4. Reduce number of defrost cycle set.
1. Check heater if operation is normal.
2. Adjust Timer for more defrost cycles.
3. Adjust defrost thermostat or Timer
for longer cycle.
4. Replace defect component.
1. Replace heater.
2. Clear drain line.
3. Replace heater, remove clogging
4. Replace defective component.
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Troubleshooting Trees
Machine Does Not Overly High or
Run Overly Low Pressure
Does machine
is the main Turn on the
No meet sufficient
switch off? switch
refrigerant?
Yes
Yes
check the
check suction
correct power
pipes that no
supply to the
sqeezed, or
machine
blazing clogged
Yes
no
check
check TXV for
continuity of
moisture-based
supply cords &
restriction
protection fuse
Yes No
check refrigerant
check cap.start,
leakage and
(and cap.run)
amperage
and magnetic
consumption
contactors
No
Yes
Hi side pressure, Lo side pressure
and Current consumption shall be
check control
related to each others, record data
board wiring
during commissioning shall be
available
continuity and
termination
Yes System Operates but
no Chilling or Freezing
action as per root
cause finding
check type of
refrigerant
Yes
check leakage of
refrigerant
no
check temp.
controller setting
& functioning
Yes
Hi side pressure, Lo side pressure and
Current consumption shall be related
to each others, record data during
commissioning shall be available
OASMs-2912-D/14/3/18
KOLDTECH
The Technology of Excellence
Isolator
Trips Oftenly
recharge the
check overload is
No
refrigerant
set sufficiently
Yes
repair the
check overly
squeezed point
charging
yes
or bottle refrigerant
necked point
no
replace drier,
check
evacuate and
compressor
Yes
recharge
wdg.if
system shorted-turn
no
check earth
leaking
no
action as per root
cause finding
Abnormal Sound
during Operation
check securing
and all movable
mechanism
Yes
check bearings,
bush and fan
blades
Yes
action as per root
cause finding
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