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Error Code [7110]; Error Code [7111] - Mitsubishi Electric PURY-HP72 Service Handbook

R410a
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[7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ]
7-9-7

Error Code [7110]

1. Error code definition
Connection information signal transmission/reception error
2. Error definition and error detection method
The given indoor unit is inoperable because it is not properly connected to the outdoor unit in the same system.
3. Error source, cause, check method and remedy
Error source
Outdoor unit
(1)
Power to the transmission booster is cut off.
(2)
Power resetting of the transmission booster
and outdoor unit.
(3)
Wiring failure between OC and OS
(4)
Broken wire between OC and OS.
(5)
The model selection switch (SW5-7) on the
outdoor unit is set to OFF. (Normally set to
ON)
7-9-8

Error Code [7111]

1. Error code definition
Remote controller sensor fault
2. Error definition and error detection method
This error occurs when the temperature data is not sent although the remote controller sensor is specified.
3. Error source, cause, check method and remedy
Error source
Indoor unit
The remote controller without the temperature
OA process-
sensor (the wireless remote controller or the
ing unit
ME compact remote controller (mounted
type)) is used and the remote controller sen-
sor for the indoor unit is specified. (SW1-1 is
ON.)
HWE13080
Cause
Cause
- 244 -
Check method and remedy
1)
Confirm that the power to the transmission
booster is not cut off by the booster being
connected to the switch on the indoor unit.
(The unit will not function properly unless the
transmission booster is turned on.)
->Reset the power to the outdoor unit.
2)
Confirm that the TB3 on the OC and OS are
properly connected.
3)
Check the model selection switch on the out-
door unit (Dipswitch SW5-7 on the control
board.).
Check method and remedy
Replace the remote controller with the one
with built-in temperature sensor.
GB

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