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Troubleshooting
Service manual
86
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Root cause category: installation
Possible failure
Root cause
Check
Repair
PHE condenser (water
side) (partial) blockage.
Dirty water (particles).
▪
Check water flow rate
registered
by
flow
sensor,
▪
Check water side plate
type heat exchanger for
blockage.
▪
If required replace the
water plate type heat
exchanger,
▪
Check the water quality.
Root cause category: component – mechanical
Possible failure
Root cause
Check
Repair
Limited heat exchange
between refrigerant loop
and heat sink inverter
could result in high inverter
temperatures and limited
compressor frequency.
▪
Bad contact between
refrigerant
loop
and
inverter heat sink,
▪
Lack of refrigerant.
Check contact between
refrigerant loop and PCB
heat sink.
—
Root cause category: component – electrical
Possible failure
Root cause
Check
Repair
Discharge pipe thermistor
– higher temperature
measured than actual.
Deviation of thermistor
(higher temperature
measured than actual).
Check discharge pipe
thermistor.
Replace discharge pipe
thermistor or main PCB.
Heat sink inverter
thermistor - deviation.
Deviation of thermistor
(higher temperature
measured than actual).
▪
Check heat sink inverter
thermistor,
▪
Check PCB.
▪
Replace
heat
sink
inverter thermistor,
▪
Replace PCB.
Expansion valve incorrect
control - superheat too
high.
▪
Faulty
suction
thermistor,
▪
Faulty expansion valve
control.
▪
Check
suction
thermistor,
▪
Check
the
expansion
valve.
▪
Replace
suction
thermistor,
▪
Replace expansion valve.
Symptom: Increased compressor sound level
Root cause category: component – mechanical
Possible failure
Root cause
Check
Repair
Compressor increased
bearing friction/bearing
failure.
▪
Bad
lubrication
of
compressor
internal
rotating parts,
▪
Compressor at end of
lifetime.
No checks possible.
Replace compressor.
Unit produces (loud) noise
or shakes.
▪
Refrigerant overcharge,
▪
Mixing
of
air
in
refrigerant system,
▪
Refrigerant undercharge.
Check refrigerant.
After vacuum drying,
charge correct amount of
refrigerant.
draft – 31/05/2022 15:53
Summary of Contents for EBLA04E V Series
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