Power Failure - IVT Optima 1000 Assembly, Commissioning And Maintenance Manual

Power failure

Possible cause: One or two phases to the heat pump are down.
Action: 1. Check that the fuses in the house's distribution box
have not blown.
2. Change the fuse if the fuse protection (small disc) has
become loose. If you have miniature circuit breakers
and these have tripped you reset them by pushing up
the toggle switch.
3. The heat pump automatically returns to the operating
mode once the fault has been rectifi ed.
Compressor temperature T6 (GT6)
Possible cause 1: The working temperature of the compressor is
too high.
Action: 1. Press the Ackn. button.
2. Contact your dealer at repeated alarms.
Possible cause 2: Intermittent temperature rise due to abnormal
operating conditions.
Action: 1. Press the Ackn. button.
2. Wait and see.
External electric cassette (EK)
The external electric cassette is installed indoors and connected to the heat
pump's control unit Rego 603.
Possible cause 1: The electric cassette's miniature circuit-breaker
has tripped.
Action: 1. Press the Ackn. button.
2. Reset the miniature circuit-breaker for the electric
cassette by pushing up the toggle switch.
3. Contact your dealer if the fuse trips again.
Possible cause 2: The electric cassette's overheat protection has
tripped.
Action: 1. Press the Ackn. button.
2. Reset the overheat protection on the electric cassette.
3. Check that the particle fi lter on the hot side is clean.
The heat pump maintains all its set-
tings in the event of a power failure,
for example, during a thunder storm.
When the power returns the heat
pump automatically starts up accord-
ing to the previous settings.
The most frequent cause for the over-
heat protection tripping is a poor fl ow
over the electric cassette, which can
be due to air in the heat carrier pump
or that the particle fi lter is clogged.
35
What to do if a fault occurs
The menu display shows:
ALARM
Power failure
031020 16:08:15
Info Ackn.
Note
The menu display shows:
ALARM (GT6)
Compressor temp
031020 16:08:15
Info Ackn.
The menu display shows:
ALARM (EK)
Electric cassette
031020 16:08:15
Info Ackn.
Note