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SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
193
3.25 Water System Abnormality
Error Code
HJ
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
Detect abnormalities using the thermistor on the heat exchanger gas side.
Detect turned OFF interlock circuit.
(When interlock setting is provided.)
Error Decision
Conditions
When temperature on the heat exchanger gas side (R4T) drops remarkably with the minimum
operation step (52 Hz) of the compressor
With interlock setting provided, when interlock circuit is turned OFF
Supposed
Causes
Clogged water piping system
Insufficient heat exchanger water
Dirty heat exchanger
Disconnected connector
Defective thermistor on the heat exchanger gas side
Defective low pressure sensor
Troubleshooting
Is the heat
exchanger dirty?
Is the
amount of water
of heat exchanger 50 l/
minute or more?
Clogged
water piping
system (mixing in of
foreign matters, solenoid
valve for water
use)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
Secure the enough water.
Remove the clog.
NO
YES
Clean the heat exchanger.
YES
NO
A