Daikin Altherma HT Service Manual

ESIE09-08B Protection Control
Function 59
4.4 Inverter Protection Control
Inverter current protection control and inverter fin temperature control are performed to prevent
tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase.
Inverter overcurrent protection control [R-410A]
Inverter overcurrent protection control [R-134a]
Not limited
Limited
Inverter current >12A
Inverter current
ⱖ 13.1A continues for 260 sec.
&
• 10 sec.
• Matching of frequency
&
•
Inverter current
standby
Status quo
Without conditions
• Inverter current ⱕ 12A
• INV upper limit frequency=max Hz
INV upper limit frequency:
1-step down from current
compressor frequency
Inverter current > 12A
Inverter current
ⱕ 12A
continues for 3 min.
INV upper limit frequency:
1-step up from current
compressor frequency
When occurring 4 times within 60 min.,
the malfunction code “L8” is output.
Not limited
Limited
Inverter current > see table
Inverter current
> 13.1A continues for 260 sec.
and
compressor stop
• 10 sec.
• Matching of frequency
and
or
15 sec.
Inverter current
standby
Status quo
Without conditions
• Inverter current < see table
• INV upper limit frequency = max Hz
INV upper limit frequency:
1-step down from current
compressor frequency
Inverter current > see table for 90 sec.
Inverter current
< see table
continues for 3 min.
INV upper limit frequency:
1-step up from current
compressor frequency
or
current value
Table
23,8A
230V
9,5A
400V

Daikin Altherma HT Specifications

General

Type	Air-to-water heat pump
Refrigerant	R-410A
Water Outlet Temperature	Up to 80°C
Operating Temperature Range	-20°C to 35°C
Power Supply	3-phase, 400V
Energy Efficiency Class (Heating)	A++