TROUBLESHOOTING
1
/5
!
[
] ~ [
] Low Pressure Protection by Suction Gas Thermistor
This alarm code is indicated when the suction temperature is lower than -2
°
C during 10 seconds.
Is the wiring of connector in the
Printed Circuit Board for Relay
(PCB
D
) correct?
Plug correctly and
repair wiring
Replace thermistor
Pull out connector and measure
thermistor resistance. Is
resistance correct?
Check Printed Circuit Board
for Relay (PCB
D
)
Thermistor
resistance
(K
Ω
)
Temperature (°C)
Thermistor for Suction Gas Temperature
characteristics
Clogging of water strainer
Yes
No
Yes
Check the water flow rate.(Check temperature
of inlet and outlet.)
Pump reverse rotating check
Check the air mixing
Clogging of expansion valve
Clogging of strainer
No
Check chilled water thermostat setting value
(Within the working range)
Shortage of refrigerant Gas Leakage
Clogging of low pressure pipe
Malfunction of Check valve
Yes
Malfunction of Expansion Valve
