GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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Once 48 hours are exceeded, the entire unit will be forcibly stopped and the limited operation code ―Ad‖
is displayed on the IDU.
I. 1#-6# compressors are defined from right to left facing the front of the unit.
5. Fan Emergency Operation DIP Switch (SA5_FAN-E)
The fan emergency operation DIP switch (SA5_FAN-E) is used for aftersales emergency settings when
an exception occurs on a dual-module fan. It can shield the operation of a fan in a short time and
guarantee the emergency operation of the system.
1) Fan positions
2) When it is required to set the fan to emergency mode, set the DIP switch as follows:
Fan Emergency Operation DIP Switch
(SA5_FAN-E)
No fan in emergency
operation mode
Shielding the operation of
1# fan
Shielding the operation of
2# fan
Precautions:
A. When the DIP switch setting is not covered in the above scope, a DIP switch setting exception fault
may occur.
B. Only one fan can be set to emergency mode on a module.
C. The default factory setting is ―00‖.
D. The system cannot continually run for more than 120 hours in fan emergency operation status. Once
120 hours are exceeded, the entire unit will be forcibly stopped and the limited operation code ―Ad‖ is
displayed on the IDU.
6. Outdoor Fan Static Pressure Setting DIP Switch (SA6_ESP_S)
The outdoor fan static pressure setting DIP switch (SA6_ESP_S) is used in special scenarios such as
the unit installation equipment room. In scenarios where air ducts are required to be connected, zero
static pressure (0 Pa), low static pressure (30 Pa), medium static pressure (50 Pa), and high static
pressure (82 Pa) can be set according to the design of air ducts. The setting methods are as follows:
Outdoor Fan Static Pressure Setting DIP
Switch (SA6_ESP_S)
The default factory setting is ―00‖.
Note that the DIP switch should be independently set on each module.
7. Reserved Function DIP Switch (SA7)
SA7 is the reserved function DIP switch and meaningless currently.
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