Daikin R407C PLUS, Service Manual

Page: 89 / 267

Outline of Control (Outdoor Unit) < Symbols using in this manual > Si33-105
78 Function R407C PLUS Series Heat Recovery System
STD compressor
[In cooling and simultaneous cooling / heating operation]
DSHs: STD compressor discharge pipe superheated degree
= Tds1, 2 (Th3-2) – (HP equivalent saturation temperature)
Tds1, 2 : STD compressor discharge pipe temperature (Th3-2)
[In heating operation]
[Defrosting and oil return mode]
SVTs turns ON continuously
!
SVTs is OFF at any case when STD compressor stops.
Operating Frequency Control
Normal operation
SVTs1 (Y6S), SVTs2 (Y7S) : ON
10 min
(V0829)
•
DSH
S
1, DSH
S
2>15˚C
•
DSH
S
1, DSH
S
2
≥
40˚C
•
Lp<0MPa
&
OR
•
DSH
S
1, DSH
S
2<15˚C
•
DSH
S
1, DSH
S
2<25˚C
•
Lp>0MPa
•
10 min elapsed
OR
Normal operation
SVTs1 (Y6S), SVTs2 (Y7S) : ON
2 min
•
Tds1, Tds2
≥
100˚C
•
LP<0.05MPa
•
(HP+0.10) / (LP+0.10)>8
•
Tds1, Tds2<90˚C
•
LP<0.07MPa
•
2 min elapsed
(V0830)
OR
&
Compressor upper-limit frequency
(Nearest lower step listed below)
•
71Hz+ON+OFF
•
75Hz+OFF+OFF
•
41Hz+OFF+OFF
In case of HTDi>115˚C
41Hz+OFF+OFF
41Hz+OFF+OFF Normal operation
HTdi
≥
110˚C HTdi
≥
115˚C
HTdi>130˚C
HTdi<105˚C
Compressor stop (for 5 min)
Forced
thermostat OFF
F3 Malfunction
stop
Normal operation
HTds1, HTds2
≥
110˚C
HTds1, HTds2<105˚C
HTds1, HTds2>130˚C
H
Malfunction reset
HTdi<115˚C
HTs1, HTs2<115˚C
HTdi, HTds1, HTds2>130˚C
(V0831)
Up to 2 times
within 100 min
HTdi : Adjusted discharge temperature
for Inverter Compressor
[INV Compressor]
[STD Compressor]