Daikin RTSQ20PY1 Service Manual page 110

Protection Control
[In heating operation]
99
Pc > 3.04
MPa
Pc < 2.89MPa
Compressor system (see *2):
1 step down per 10 sec.
Pc > 3.04 Pc < 2.94
MPa MPa
Compressor system (see *2):
1 step up per 10 sec.
Pc > 3.64
MPa
Restart standby
(2 times per 30 min. at maximum)
Pc: Value detected by the high pressure sensor of master unit.
*2 : For compressor system steps, refer to information on P.92 and 93.
*3 : Return high-pressure refrigerant to the low pressure side.
• Operating in 2-stage
&
compression mode
• PcK > 3.04MPa
• PcK - PcN > 0.49MPa
• PcK < 2.94MPa
INV compressor of
function unit:
1 step down per 10 sec.
• PcK > 3.04MPa
• PcK > 3.64MPa
Restart standby
(2 times per 30 min. at maximum)
PcK: Value detected by the high pressure sensor of function unit.
PcN: Value detected by the high pressure sensor of master outdoor unit.
< Outdoor unit >
Normal operation
Pc < 2.55MPa
Make opening
Pc > 3.30MPa
degree adjustment
of electronic
expansion valve
(Y1E) (see *3)
High pressure sensor
(4.0MPa) is activated.
Stop due to malfunction
(E3 displayed)
< Function unit >
Normal operation
• PcK < 2.89MPa
OR
• PcK - PcN < 0.29MPa
INV compressor of
function unit:
1 step up per 60 sec.
High pressure sensor
(4.0MPa) is activated.
Stop due to malfunction
(E3 displayed)
SiBE31-801_C
Function