ESIE13-03
|
Part 2. Troubleshooting
3. Symptom based troubleshooting
13/05/15
|
Version 2.0
Page 47
Ground source heat pump
3.9. Increased sound level - brine pump
Backup heater equilibrium
point was set too high.
Setting "equilibrium tempera-
ture" [5-01] was set too high.
Check setting [5-01].
Change setting [5-01] to less
quickly allow backup heater
operation.
Setting domestic hot water
operation mode [6-0D] not set
optimally.
Setting domestic hot water
operation mode [6-0D] is set to
0 (reheat only). This will cause
the system to work too fre-
quently in domestic hot water
operation and less in space
heating.
Check setting [6-0D] in combi-
nation with the re-heat setpoint
[6-0C].
It is advisable to set to factory
setting ( schedule)
and program the schedule to
heat the domestic hot water
during periods of no space
heating required.
Root cause category: component - electrical
Deviation of backup heater
outlet thermistor (R2Tin - A1P)
will influence the backup
heater control.
• Deviation
of
thermistor
(lower temperature
measured than actual).
• Bad
contact
between
sensor and pipe.
Check thermistor R2Tin (see
).
If required replace thermistor
R2Tin (see
) or PCB
A1P (see
).
Root cause category: system design
Water circuit - requested
capacity too high causing the
system always to run at full
capacity.
Incorrect system selection.
Check required capacity by
heat load calculation. Refer to
the capacity tables in the engi-
neering databook to know
max. system capacity at indi-
cated conditions.
Adapt system design.
Possible failures
Root cause
Check
Corrective action
Root cause category: installation
Brine pressure too low.
• Brine pressure not
checked during filling.
• Air was purged from the
brine system after filling.
Check brine pressure.
Adjust brine pressure if
required (1 - 2 barg).
Brine circuit (partially) blocked.
Obstruction in brine system.
Check brine circuit for block-
ages.
Remove possible blockages
and check the brine quality.
Air in the brine system.
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
brine system.
Purge air out of unit and field
supplied brine system.
Brine filter (FI1) (partially)
blocked.
Dirty brine.
Check brine filter.
• Clean the brine filter (see
• Check the brine quality.
Root cause category: component - mechanical
Brine pump (M3P) mechani-
cal problem.
Internal pump friction.
Check brine pump (see
).
If required replace brine pump
(see
Possible failures
Root cause
Check
Corrective action
Содержание EGSQH10S18AA9W
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Страница 82: ...ESIE13 03 Part 2 Troubleshooting 4 Component checklist Page 82 13 05 15 Version 2 0 Ground source heat pump ...
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