Emergency Operation - Daikin VRV Inverter K Series Manual

SI-05C.BOOK Page 244 Monday, November 6, 2000 4:13 PM
Outline of Control

4.18 Emergency Operation

4.18.1 Emergency Operation 1
If INV outdoor unit cannot operate, you can operate with STD outdoor units only if the outdoor temperature
doesn't exceed the reference temperature. Emergency operation is executed by setting mode 2 to EMG
(emergency operation).
When Cooling (For Heat Pump System)
When Cooling
Control IN conditions &
Step 1
INV outdoor
0 Hz + OFF
unit
STD outdoor
ON + OFF
unit 1
STD outdoor
ON + OFF
unit 2
Step 2
INV outdoor
0 Hz + OFF
unit
STD outdoor
unit 1
STD outdoor
unit 2
Oil return
INV outdoor
0 Hz + OFF
unit
STD outdoor
ON + OFF
unit 1
STD outdoor
ON + OFF
unit 2
HPS operation for either STD outdoor unit 1 or 2 → Fixed to L tap ON by thermostat unit only.
244
Emergency operation setting
Outdoor temperature detected to be above 20˚C
for STD outdoor unit 1
: Operates No. 1 compressors only of STD outdoor unit 1 and 2.
Comp- Outdoor Outdoor
ressor unit fan unit EEV
H + ON 0 PLS
H + ON 2000 PLS
H + ON 2000 PLS
5 minutes elapse
Liquid pipe temp.
of STD outdoor unit 2 < 58˚C
: Operates all compressors of STD outdoor unit 1 and 2.
Comp- Outdoor Outdoor
ressor unit fan unit EEV
H + ON 0 PLS
ON + ON H + ON 2000 PLS
ON + ON H + ON 2000 PLS
Compressors operate total of 70 min.
following previous oil return.
: Operates by executing oil return for standard types 1 and 2.
Comp- Outdoor Outdoor
ressor unit fan unit EEV
H + ON 0 PLS
H + ON 2000 PLS
H + ON 2000 PLS
Either malfunction, retry or outdoor temp. < 15˚C
Quit
Indoor Unit Fan Control
Hot gas bypass
Indoor units execute superheating
ON
control in this mode.
OFF
OFF
Liquid pipe temp. STD outdoor unit 1 > 60˚C
Hot gas bypass
ON
OFF
OFF
3 minutes elapse
Hot gas bypass
ON
OFF
OFF
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SiE-05C
(VF123)
Functions PLUS Series