102
15
Backup Operation
Emergency Operation
Fault in fixed-speed unit (Backup of slave outdoor unit)
Outline
When a fixed-speed unit connected to the system fails, firstly perform emergency process
according to the following work procedure, and then perform emergency operation on the
inverter unit and other fixed-speed units.
Work procedure
(1) First,
turn off the source power of all the outdoor units
which are connected to
the system.
(2) The following works are performed to
the failed fixed-speed unit
.
1)
Close service valve of gas pipe fully
(fully close by turning clockwise).
2) If refrigerant leakage occurs on PMVB, close service valve of the
liquid pipes.
(Fully close by turning clockwise)
3) Check service valve of the balancing pipe is open fully (fully open by turning
counterclockwise).
4) [In case of fault of compressor/fault of electric part system]
a. Works to the failed fixed-speed unit are complete.
b.
Then, keep the source power OFF.
5) [In case of fault of other cycle part system]
a.
Remove BUS-1 communication connector (BLU)[CN601] on the interface
P.C. board.
b. Works to the failed fixed-speed unit are complete.
c.
Then, turn on the source power to protect the compressor.
(Turn on crank case heater)
(3) Perform the following works
for the inverter unit
.
1) Set
DIP SW 07/Bit 3 on the interface P.C. board to ON
.
(Setup to correct oil recovery capacity)
2)
Turn on the source power of each outdoor unit.
3)
Set operation permission of outdoor unit backup operation (alarm clear setup).
a. Set rotary switches on the interface P.C. board, SW03 to [No.1]/SW02 to
[No.1]/SW01 to [No.1].
b. After [U.][1 ][8 ][d ] is displayed on the 7 segment LED of the interface P.C. board,
set SW03 to [No.1]/SW02 to [No.16]/SW01 to [No.2].
c. After [E.][r ][ ][ ] is displayed on the 7 segment LED of the interface P.C. board, keep
push-switch SW04 pushed for 5 seconds or more.
[E. ][r ][C ][L ] is displayed on the 7 segment LED for 5 seconds, and work is complete.
d. Set SW03 to [No.1]/SW02 to [No.1]/SW01 to [No.1].
If [U.][1 ][ ][ ] is displayed on the 7 segment LED, it is normal.
(4) Then, emergency process is complete. The operation then starts by a command from the
indoor unit.
Summary of Contents for MM-A0160HX
Page 1: ...Service Manual Air Conditioner Multi Split Type System Modular Multi System HFCR407C A90 0130 ...
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Page 133: ...134 20 Additional Literature and Contacts ...
Page 134: ...135 20 Additional Literature and Contacts ...
Page 135: ...TOSHIBA AIR CONDITIONING www toshiba aircon co uk MADE IN UK A90 0130 Revised April 2001 ...
