Stopping Operation - Daikin ERQ Series Service Manual

ESiEN09-06 A
3.6

Stopping Operation

3.6.1 When System is in Stop Mode (Normal operation stop)
This mode is used to define actuator operations when the system stops.
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Accumulator oil return valve (SVO)
Injection (SVT) (ERQ 125 model only)
Ending conditions
3.6.2 Stop due to Malfunction
In order to protect compressors, if any of the following items has an abnormal value, the system will make "stop with
thermostat OFF" and the malfunction will be determined according to the number of retry times.
Item
1. Abnormal low pressure level
2. Abnormal high pressure level
3. Abnormal discharge pipe temperature level
4. Abnormal power supply voltage
5. Abnormal inverter current level
6. Abnormal radiator fin temperature level
Function
Actuator
0.07MPa
4.0MPa
135 C
Reverse-phase power supply
16.1A: 260 sec.
93 C
OFF
OFF
Holds
0 pls
0 pls
OFF
OFF
OFF
AHU thermostat is turned ON.
Judgment Criteria
Special Control
Operation
Malfunction Code
E4
E3
F3
U1
L8
L4
35