ESIE15-08B
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Part 2. Troubleshooting
3. Symptom based troubleshooting
Page 58
19/07/16
Daikin Altherma Monobloc CA
3.8. Increased sound level - water pump
3.9. Increased sound level - compressor
Possible failures
Root cause
Check
Corrective action
Root cause category: installation
Water filter blocked.
Dirty water.
•
Check water filter.
• Check
water
quality.
Clean the water filter.
Air in the water circuit.
Not enough air purged.
•
Check if all air purge valves
are open.
•
Check if air purge valves
are installed on all highest
points of the field installed
water circuit.
Purge air out of unit and field
supplied water system and
backup heater.
Water pressure too low.
•
Water pressure not
checked during filling.
•
Air was purged from the
water system after filling.
• Leakage.
Check water pressure.
Adjust water pressure if
required (1 - 2 barg).
Water circuit partially blocked.
Obstruction in the water sys-
tem.
Check water circuit for block-
ages.
Remove possible blockages
and check the water quality.
Root cause category: component - mechanical
Water pump mechanical prob-
lem.
Internal pump friction.
Check water pump (see
page 73).
Replace water pump.
Air Purge blocked - air trapped
in water system.
Component failure.
Check air purge valve.
Replace air purge valve.
Possible failures
Root cause
Check
Corrective action
Root cause category: component - mechanical
Compressor increased bear-
ing 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.
Root cause category: component - electrical
Expansion valve incorrect con-
trol - superheat too low.
• Faulty
thermistor.
•
Faulty expansion valve
control.
• Check
thermistors
•
Check the expansion valve
(see page 97).
If required replace thermistors
(see page 124) or replace
expansion valve (see
page 131).