technical & service manual dc inverter multi-system air conditioner

7-3-2. Maximum Current Value Change Function
The maximum current value is changed to 15.0A or 13.5A to prevent power breaker tripping.
(It is set to 20A when the unit is delivered from the factory.)
NOTE
(1) Remove the right front cover.
Refer to Fig. 2 in "7-3-1 Noise Reducing Control" for details.
(2) When the switch No.1 of the dip switch (SW02) on the control P.C.Board is turned ON,
the maximum current value change function is available. (Fig. 4)
(3) Using the switch No.2 of the dip switch (SW02) on the control P.C.Board, the maximum current
value is changed. (Fig. 4)
Dip Switch
SW02
1. When the high load is given (Outside temperature is high in the cooling operation, or
outdoor temperature is low in the heating operation), the capacity is reduced.
When the maximum current value change function is to be enabled, make sure to receive
the approval of the client.
2. The maximum capacity for cooling or heating operation is about as much as the rated
capacity.
Description of function
Frequency Current
Target
frequency
Example of operation for heating
Frequency
Stops operation
Approx.3 minutes
ON
OFF
Max. Current Value
13.5A
15.0A
Power Point C
Point B
Point A
• Operates at the target frequency at Point A and below.
• Stops increases to the frequency between Points A and B.
• Reduces the frequency by 1 Hz per 0.5 seconds when Point B is exceeded.
•
Stops operation, and restarts it appoximately 5 minutes later, if Point C is exceeded.
(May operate when sudden voltage fluctuations occur. Indicates trouble.)
ERR0
ERR1
ERR2
ERR3
Fig.4 Control P.C.Board
25
Power lamp
SW01
• In cooling or heating operation
Max. Current Value 15.0A 13.5A
Current Value
on the Point B
15.0A 13.5A
Current Value
on the Point A
13.8A 12.3A
SW02
SW02
ON
1 2
Dip switch (SW02)