Increased Sound Level - Water Pump; Increased Sound Level - Compressor - Daikin EGSQH10S18AA9W Service Manual

ESIE13-03 | Part 2. Troubleshooting

3.10. Increased sound level - water pump

Possible failures
Root cause category: installation
Water filter (FI2) blocked.
Air in the water circuit.
Water pressure too low.
Water circuit partially blocked.
Root cause category: component - mechanical
Water pump (M1P) mechani-
cal problem.
Air Purge (AP) blocked - air
trapped in water system.

3.11. Increased sound level - compressor

Possible failures
Root cause category: parameter (setting)
Capacity boost setting [A-03]
activated.
Root cause category: component - mechanical
Compressor (M1C) increased
bearing friction/bearing failure.
Root cause category: component - electrical
Expansion valve (K1E) incor-
rect control - superheat too
low.
Page 48
Ground source heat pump
Root cause
Dirty water.
Not enough air purged.
• Water pressure not
checked during filling.
• Air was purged from the
water system after filling.
• Leakage.
Obstruction in the water sys-
tem.
Internal pump friction.
Component failure.
Root cause
Capacity boost setting [A-03]
is set to 1. Compressor can
run at 193 Hz instead of
148 Hz. Unit will deliver 12 kW
instead of 10 kW. Due to the
higher rotation frequency the
compressor will make more
noise.
• Bad lubrification of
compressor internal
rotating parts.
• Compressor at end of
lifetime.
• Faulty suction R3T-A9P
thermistor.
• Faulty low pressure liquid
(R4T-A9P) thermistor
• Faulty expansion valve
control.
3. Symptom based troubleshooting
Check
• Check water filter.
• Check water quality.
• 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.
Check water pressure.
Check water circuit for block-
ages.
Check water pump (see
page 66).
Check air purge valve.
Check
Check setting [A-03].
No checks possible.
• Check thermistors R3T
and R4T (see page 58).
• Check the expansion valve
(see page 72).
Corrective action
Clean the water filter (see
page 100).
Purge air out of unit and field
supplied water system and
backup heater.
Adjust water pressure if
required (1 - 2 barg).
Remove possible blockages
and check the water quality.
Replace water pump (see
page 115).
Replace air purge valve.
Corrective action
Replace compressor.
If required replace thermistors
R3T and R4T (see page 143)
or replace expansion valve
(see page 133, page 135).
13/05/15 | Version 2.0