Water heat exchange unit
H - 15
5. Control
(4) Abnormality display
●Reset method [common for to ]: After removing the cause of the abnormality, automatic recovery or reset button
1Sensor abnormality (determined on the water heat exchanger side)
Water heat exchanger unit refrigerant inlet temperature (primary or secondary) [F01]
• Detection method
Wire break (-30
o
C t) or short circuit (130
o
C t)
Abnormality of water heat exchanger unit freeze prevention sensor(primary or secondary)[F02]
• Detection method
Wire break (-30
o
C t) or short circuit (130
o
C t)
Abnormality of water heat exchanger unit refrigerant outlet temperature (primary or secondary)[F03]
• Detection method
Wire break (-30
o
C t) or short circuit ((130
o
C t)
Abnormality of hot and cold water inlet temperature sensor [F10]
• Detection method
Wire break (-30
o
C t) or short circuit (80
o
C t)
Abnormality of hot and cold water outlet temperature sensor [F11]
• Detection method
Wire break (-30
o
C t) or short circuit (80
o
C t)
2Serial communication abnormality, faulty setting (determined by the water heat exchanger unit, remote control
side)
Faulty remote control reception[E01]
• Detection method: No communication addressed to the device has been received for 3 minutes
Remote control transmission fault [E02]
• Detection method: The device cannot read it’s own transmissions for 3 minutes
Faulty reception from the remote control by the water heat exchanger unit [E03]
• Detection method: There has been no communications addressed to the device for 3 minutes
Faulty reception from the outdoor side by the water heat exchanger unit [E04]
• Detection method There has been no communications addressed to the device for 3 minutes
Faulty transmission to the outdoor side from the water heat exchanger unit [E05]
• Detection method: The device cannot read it’s own transmissions for 3 minutes
Duplication of indoor unit address
forbidden link cabling [E08]
• Detection method
Another unit has the same indoor unit address as the unit
Faulty transmission by the water heat exchanger unit to the remote control [E13]
• Detection method: The device cannot read it’s own transmissions for 3 minutes
3Faulty setting, setting not completed (determined by the water heat exchanger unit)
Faulty setting [L16]
• Detection method
(setting temperature, chiller/water, shift) switch set outside specification range
Duplication of parallel address (when using RS485 communication) [L19]
• Detection method
Another device has the same parallel address as the device
4Other warnings (determined by the water heat exchanger unit)
Water heat exchanger unit freeze warning [P11]
• Detection method
While the outdoor unit is operating, the freeze prevention temperature is detected by
either the freeze prevention sensor, the hot and cold water inlet/outlet sensor, or the refrigerant outlet
temperature sensor.
Interlock warning (ancillary equipment)[P23]
• Detection method
Within 30 seconds after a hot and cold water pump operate command, the interlock
does not turn ON, or, the interlock turns off during a hot and cold water pump operate command.
Non-volatile memory (EEPROM) abnormality [F29]
• Detection method
Inability to write normally
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