Daikin MicroTech III DPS, Installation And Maintenance Manual

Page: 27 / 114

Commission Unit
www .DaikinApplied .com 27 OM 1263 • MICROTECH UNIT CONTROLLER
Expansion Valve Set-Up
Table 15: Expansion Valve Set Up Menu
Item Display
Name
Default
Setting
Range
Password
Level
Expansion Valve Status
EVI Pos= — 0–100% 4
EVO Pos= — 0–100% 4
EV Status= —
OK
4
EVIErr
EVOErr
EVI&OErr
InitErr
MBErr
Refrigerant Circuit Status
PTS= — 0–5000kPa 4
PTD= — 0–5000kPa 4
Suction SH= — -100 .0–100 .0°F 4
Discharge SH= — -100 .0–100 .0°F 4
Subcooling= — -100 .0–100 .0°F 4
Eff SSH Spt= — 3 .0–22 .0°F 2
EffSH Base= — 5 .0–9 .0°F 2
Eff SC Spt= — 0 .0–15 .0°F 2
Eff SC Lo Lmt= — 0–100% 2
SRT= — -50 .0–200 .0°F 2
Disch Sat Tmp= — -50 .0–212 .0°F 2
Sucn Sat Tmp= — -50 .0–212 .0°F 2
IRT= — -50 .0–200 .0°F 2
ORT= — -50 .0–200 .0°F 2
Expansion Valve Set Up
SSH DB= 0 .5°F 0–10 .0°F 2
SSHLoBase= 5 .0°F 0–10 .0°F 2
SSHHiBase= 8 .0°F 0–10 .0°F 2
Htg EVI Meth= STD
STD
2
Sbc
IC SC Spt= — 0–15 .0°F 2
IC SC DB= — 0 .0–10 .0°F 2
HtgSC EVI Min= 0% 0–100% 4
Clg EVO Meth= STD
STD
2
ALT
OC SC Spt= — 0–15 .0°F 2
OC SC DB= — 0 .0–10 .0°F 2
ClgSC EVI Min= 0% 0–100% 4
ManCtrl EV Op= Auto
Man
2
Auto
EVO Pos
(Heat Pump only) is a status only item which
displays the current position of the outdoor expansion valve .
EVI Pos is a status only item which displays the current
position of the indoor expansion valve .
EVI Status is a status only item which displays the current
status of the connection between the IFB communication board
and the expansion valve control board (EVB) .
PTS is a status only item which displays the current suction
refrigerant line pressure sensor reading .
PTD is a status only item which displays the current discharge
refrigerant line pressure sensor reading .
Suction SH is a status only item which displays the current
suction superheat value based on suction temperature minus
saturated suction pressure .
Discharge SH= is a status only item that indicates the current
discharge superheat value based on discharge refrigerant
temperature minus the discharge saturation temperature .
Subcooling (Heat Pump only) is a status only item which
displays the current discharge subcooling value .
Eff SSH Spt is a status only item which displays the effective
suction superheat set point . This value varies depending on
suction and discharge superheat conditions .
Eff SH Base is a status only item which displays the effective
suction superheat base set point value . This value is normally
set equal to the SH Hi Base value but can be lowered toward
the SH Lo Base value during steady state supply fan and
compressor operation .
Eff SC Spt
(Heat Pump only) is a status only item which
displays the effective subcooling set point. This value is
normally set equal to the IC SC Spt (or OC SC Spt) value but
can be raised toward 15°F during steady state supply fan and
compressor operation .
Eff SC Lo Lmt (Heat Pump only) is a status only item which
displays the effective subcooling expansion valve position low
limit . This value is normally set to the 50% but can be lowered
during steady state supply fan and compressor operation .
SRT
is a status only item which displays the current suction
refrigerant line temperature sensor reading . This value is used
to calculate suction superheat .
Disch Sat Tmp is a status only item which displays the current
discharge pressure equivalent saturation temperature.
Sucn Sat Tmp
is a status only item which displays the current
suction pressure equivalent saturation temperature.