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Protection Control
SiUS28-902_a
31
Function
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]
Discharge pipe
temp. control standby
HTdi>275˚F
HTdi>248˚F for 10 min. or more.
or
When occurring 3 times within 100 min.,
the malfunction code "
F3
" is output.
•
HTdi<203˚F
or
• Defrost operation
(preparation ~ post operation)
• Oil return operation in heating
(preparation ~ post operation)
• Oil return operation in cooling
(without preparation and post operation)
•
Tp<212˚F
•
INV upper limit Frequency.
or
30 sec.
• 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 operation)
•
Tp>266˚F
•
HTdi>221˚F
In discharge pipe protection control
&
&
•
Tp>266˚F
•
HTdi>230˚F
or
•
HTdi>239˚F for 90sec. or more
•
Tp>284˚F
•
HTdi>266˚F
or
Cooling: 20 sec.
Heating: 60 sec.
•
Tp<239˚F
•
HTdi<212˚F
&
Discharge pipe protection control not limited
Keep the current step
INV. frequency 1-step down from
current compressor frequency
(lower limit: 57Hz)
INV. upper limit frequency:
1-step up from current
compressor frequency
Exclusion of
the right
conditions
Fix INV. frequency 57Hz
HTdi :Value of INV. compressor discharge pipe
temperature (Tdi) compensated with
outdoor air temperature
Tp :
Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
Summary of Contents for SkyAir FCQ18PVJU
Page 1: ...Split System Air Conditioners SkyAir Inverter R 410A Heat Pump 60Hz P Series SiUS28 902_a...
Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
Page 185: ...SiUS28 902 Precautions for New Refrigerant R 410A Precautions for New Refrigerant R 410A 178...