Mini UM S/M
Protection Control
Function
47
4.3
Discharge Pipe Protection Control
This discharge pipe protection control is used to protect the compressor internal temperature
against a malfunction or transient increase of discharge pipe temperature.
[INV compressor]
HTdi>135°C
HTdi>115°C for 10 min. or more.
or
When occurring 3 times within 100 minutes,
the malfunction code "F3" is output.
(V3177)
Discharge pipe
temp.control standby
•
HTdi<95°C
or
•
Tp<100°C
or
30 sec.
•
Tp>130°C
•
HTdi>105°C
In discharge pipe protection control
&
&
•
Tp>130°C
•
HTdi>110°C
or
•
HTdi>115°C for 90 sec. or more
•
Tp>140°C
•
HTdi>130°C
or
•
Tp<115°C
•
HTdi<100°C
&
Discharge pipe protection control not limited
Keep the current step
INV frequency 1-step down from
current compressor frequency
(lower limit: 52Hz)
INV upper limit frequency:
1-step up from current
compressor frequency
Exclusion of
the right
conditions
Fix INV frequency 52Hz
HTdi :
Tp :
Value of INV compressor discharge pipe
temperature (Tdi) compensated with
outdoor air temperature
Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
Not during defrost operation
(preparation ~ post operation)
Not during oil return operation in heating
(preparation ~ post operation)
Not during oil return operation in cooling
(without preparation and post opeation)
•
•
•
Defrost operation
(preparation ~ post operation)
Oil return operation in heating
(preparation ~ post operation)
Oil return operation in cooling
(without preparation and post operation)
•
•
•
Cooling: 20 sec.
Heating: 60 sec.
Mini UM.book Page 47 Monday, January 24, 2005 11:32 AM
