Std Compressor Overload Protection; Injection Control (Only For Erq 125 A7W1B) - Daikin ERQ Series Service Manual

Protection Control
4.5

STD Compressor Overload Protection

This control is used to prevent abnormal heating due to overcurrent to the compressor resulting
from failures of STD compressor such as locking.
Demand to operate.
STD compressor OFF for 30 min.*
When occurring 3 times within 90 minutes,
the malfunction code " E6 " is output.
4.6

Injection Control (only for ERQ 125 A7W1B)

For transitional rise in discharge pipe temperature, have the liquid refrigerant flow into the
suction side to reduce the discharge pipe temperature for the compressor protection.
HTdi > 112˚C
40
STD compressor ON
CT detection current value>15.0A
SVT = OFF
HTdi < 107˚C
SVT = ON
*If the power supply is reset while in
operation prohibition mode, the prohibition
timer will continue counting when the
power supply is turned ON.
HTdi: Correction value of the discharge pipe
temperature on the INV compressor.
ESiEN09-06 A
Function