Discharge Pipe Protection Control - Daikin REYQ-TA Series Service Manual

SiUS371614E
6.3

Discharge Pipe Protection Control

This discharge pipe protection control is used to protect the compressor internal temperature
against an error or transient increase of discharge pipe temperature.
HTdi > 115˚C
(239˚F)
After 30 seconds
3-step down
HTdi > 115˚C
(239˚F)
After 30
seconds
9-step down
HTdi > 120˚C
(248˚F)
HTdi > 125˚C
(257˚F)
21-step down
After 30 seconds
HTdi > 130˚C
HTdi > 135˚C (275˚F)
OR
HTdi > 120˚C (248˚F)
continues for 10 minutes
Discharge pipe temperature
(2 times within 100 minutes)
Functions and Control
Upper limit compressor step:
max (Max. Step)
Normal Operation
After 20 seconds
Current
step
maintained
After 20 seconds
After 20 seconds
(266˚F)
Compressor step: 1
standby
9-step up
HTdi < 105˚C
(221˚F)
HTdi < 110˚C
(230˚F)
3-step up
Discharge pipe temperature standby
(3 times within 100 minutes)
Abnormal stop
(F3 is displayed)
Protection Control
HTdi: Value of inverter compressor
discharge pipe temperature
(Tdi) compensated with
outdoor air temperature
76