Panasonic CS-VE9NKE Service Manual page 65

H29 Outdoor unit heat
exchanger
temperature sensor 2
error
H33 Connection error of
the models with
different voltage
power supply
H38 Brand not
corresponding
H50 Ventilation fan motor
error
H53 Heat storage tank
temperature sensor
error
H59 Infrared sensor error
H70 Sunlight sensor error
H96 2- and 3-way valve
opening failure check
H97 Outdoor unit fan
motor lock error
This error code is displayed when the detected temperature of the outdoor temperature
sensor 2 is below -58°C or 107°C or higher for 5 consecutive seconds.
<Points of diagnosis>
1. This is an error code displayed when an improbable temperature is detected.
If the sensor is not open (≥ 500kΩ) or short-circuited (≤0.5kΩ), poor contact of the
connector or a failure of control board has occurred.
This error code is displayed when the models of indoor and outdoor units are different or
when 200V or 100V model is connected to 100V and 200V models, respectively.
 This function does not apply to the case where the supply voltage of the indoor unit is
doubled.
<Points of diagnosis>
1. Check for the model compatibility between indoor & outdoor units; Check of supply
voltage.
1 200V indoor unit: When 100V or 200V is supplied and the outdoor unit is a 100V
model:
The indoor unit immediately turns off the power relay and H33 is displayed. After the
reset is cancelled, the power relay does not turn on if the indoor unit is a 200V
model.
2 Both indoor and outdoor units are 200V models and 100V power is supplied:
If the DC voltage of the outdoor unit is 180V or below after 20 seconds from power
relay ON, the signal is transmitted to the indoor unit. If the error occurs one more
time, H33 is displayed.
3 100V indoor unit: When 100V is supplied and the outdoor unit is a 200V model:
The indoor unit immediately turns off the power relay and H33 is displayed.
This error code is displayed when the connection is different between the indoor and
outdoor units.
<Points of diagnosis>
1. Check of models and capabilities of indoor and outdoor units.
2. Short-circuit of CN-S on outdoor unit control board.
If a rotation error (too high/low speed) is detected for 55 consecutive seconds, only the
ventilation fan motor is stopped and then restarted. If the rotation error is detected
seven consecutive times, the ventilation fan motor lock is determined and this error
code is displayed.
Or, if the speed of the ventilation fan during Auto Clean is below 4000rpm for 250
consecutive seconds, the Auto Clean operation is stopped. If this occurs three
consecutive times, this error code is displayed.
<Points of diagnosis>
1. Check for ventilation fan motor lock.
2. Poor contact and detached ventilation fan motor connector, ventilation fan motor
failure and indoor unit control board.
The TIMER indicator flashes when the disconnection or short-circuit of heat storage
tank sensor is detected for 5 consecutive seconds. (The air conditioner continues the
operation.)
<Points of diagnosis>
1. This is an error code displayed when an improbable temperature is detected.
If the sensor is not open or short.-circuited, poor contact of the connector or a failure
of control board has occurred.
This error code is displayed when the infrared sensor shows no response within 30
seconds after it is ON or continuously responds between 80 and 250 seconds after it is
ON.
<Points of diagnosis>
1. Check of the detection and location of the infrared sensor.
2. Check for disconnection and detached infrared sensor.
When 24-hour disconnection is detected for 15 consecutive days, the diagnosis code
"H70" is displayed on the indoor unit and ECONAVI LED is OFF. (The air conditioner
continues the operation.)
<Points of diagnosis>
1. Failure of the sunlight sensor.
2. Detached sunlight sensor connector.
Failure to open the 2- and 3-way valve is detected based on the changes in indoor unit
intake air temperature and indoor unit pipe temperature. The time required for this
detection is approximately 10 minutes when in COOL mode and approximately 25
minutes when in HEAT mode.
<Points of diagnosis>
1. Check if the 2-way and 3-way valves are closed.
If a rotation error (too high/low speed) is detected for 10 consecutive seconds, only the
fan motor is stopped and then restarted. If the rotation error is detected 2 consecutive
times or if an overcurrent (fan motor current 3A and above) is detected, the compressor
is stopped, and then restarted after 180 seconds. If the error or overcurrent is detected
two times within 20 minutes, this error code is displayed.
<Points of diagnosis>
1. Check for outdoor unit fan motor lock.
2. Poor contact and detached fan motor connector, fan motor failure and outdoor unit
control board.
65
 Outdoor unit heat
exchanger
temperature
sensor 2
(Bad connection /
detached
connector)
 Model difference
between indoor &
outdoor units
 Check of supply
voltage
 Models of indoor
and outdoor units
 Ventilation fan
motor
(Bad connection /
detached
connector)
 Indoor unit control
board
 Heat storage tank
temperature sensor
(Bad connection /
detached
connector)
 Infrared sensor
(Bad connection /
disconnection /
detached
connector)
 Sunlight sensor
(Bad connection of
connector)
 2- and 3-way valve
opening failure
 Outdoor unit control
board
 Outdoor unit fan
motor
(Bad connection /
detached
connector)