ESIE13-03
|
Part 2. Troubleshooting
2. Error code based troubleshooting
Page 34
13/05/15
|
Version 2.0
Ground source heat pump
2.42. “U5-00” – Transmission error between user interface and hydro PCB
2.43. “7H-01” – Water flow abnormality
Trigger
Effect
Reset
Hydro PCB detects abnormal transmis-
sion to user interface for a certain time.
Unit will stop operation.
Auto-reset.
Possible cause
Check
Corrective action
Both user interfaces are set to the same
"user interface location" (in room / at unit)
(only applicable when 2 user interfaces
are connected to 1 unit).
Check setting [A.2.1.B] on both user inter-
faces.
Correct user interface location via setting
[A.2.1.B].
Faulty user interface.
Replace user interface.
Faulty hydro PCB A1P.
Replace PCB A1P (see
).
External factor (e.g. electrical noise)
(cause when error is reset after power
reset, and error happens again after
awhile).
Check for source which could cause elec-
trical interference.
Trigger
Effect
Reset
Flow sensor detects a water flow below
7 l/min for 15 seconds.
Unit will stop operating.
Via user interface.
System detects flow abnormality during
operation.
Unit will stop operating, after some time
will automatically try to start operation
again.
Auto-reset
During heating operation: water flow < 10
l/min for 15 seconds.
Unit will stop operating, after some time
will automatically try to start operation
again.
Auto-reset
During cooling operation: water flow < 10
l/min for 15 seconds.
Unit will stop operating, after some time
will automatically try to start operation
again.
Auto-reset
During BUH operation: water flow < 12
l/min for 15 seconds.
Unit will stop operating, after some time
will automatically try to start operation
again.
Auto-reset
Possible cause
Check
Corrective action
Closed valve in water circuit.
Check if all valves are open.
Adjust / open valve.
Water pressure is too low.
Check the water pressure on the pressure
gauge (PG2).
Water leak.
Increase water pressure till ~ 2 bar. Refer
to the Installer Reference Guide.
Fix the water leak.
Air in water circuit / unit.
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. Refer to
the Installer Reference Guide.
Water filter is blocked.
Check water filter.
Clean water filter (see
Check water quality and possible source
of dirt.
Static pressure of water circuit is too high.
Check the system design and determine
static pressure of the water circuit (for
each loop).
Correct hydraulic field circuit (e.g. use of
balancing bottle). Refer to the Installer
Reference Guide or to the Data Book (for
pump characteristics).
Содержание EGSQH10S18AA9W
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