Heat Pump, Split System, Single Service, 3 phase
58 Maintenance Document 1394-1
5 Failures
5.1 Hydraulic, Electric and Refrigeration Systems
5.1.1 Hydraulic System
If the installation is fitted with a heating floor, the most
common failures are those listed below:
FAILURE CASES CONSEQUENCES SOLUTIONS
APPLIED
BY
Flow pressure too high clean filter or desludge Installer
1- Clogged filter*
or sludge in system
∆T too high (>7) clean filter or desludge Installer
Zero flow pressure
change pump with warranty if pump
is faulty
Service
station
current too high (rotor locked)
change pump with warranty if pump
is faulty
Service
station
zero current (winding cut off)
change pump with warranty if pump
is faulty
Service
station
2- Pump out of order
pump stuck release with a screwdriver
Installer
Pipe leak. Pipe
under warranty if
faulty
Service
station
3-Leak Low level in expansion vessel
On collector,
isolate heating
circuits to
determine which
heating circuit is
perforated.
Leak in heating
circuit. Floor
again.
Installer
On collector,
check heating
circuit flow/return
temps (infrared
thermometer)
Clear with test
pump
4- Clogged heating
circuit (crushed pipe)
Very high difference between floor
flow/return temp
If no clogged
heating circuit,
check for
crushing with
infrared camera
Call the installer's
or floor coverer's
responsibility into
question
Service
station
5- Misbalance
Very high difference between floor
flow/return temp
Rebalance Installer
6- Floor undersized or
charge losses too high
Very high difference between floor
flow/return temp
On collector,
check heating
circuit flow/return
temps (infrared
thermometer)
Call the installer's
responsibility into
question
Installer
or
Service
station
* Not required and not shown on the device.
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