Panasonic CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1E Simplified Service Manual ▷ View online
10.6.2. Drain Test
When installing the unit and you want the drain pump to operate independently, press the DRAIN TEST switch to operate it for
about 5 minutes.
about 5 minutes.
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CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1E
10.6.3. Self Diagnosis display
10.6.3.1. BreakDown Self Diagnosis Function (Three Digits Alphanumeric Code)
·
Once abnormality has been detected during operation, the unit
will immediately stop its operation. (Timer LED blinks.)
will immediately stop its operation. (Timer LED blinks.)
·
Although timer LED goes off when power supply is turned off, if
the unit is operated under a breakdown condition, the LED will
light up again.
the unit is operated under a breakdown condition, the LED will
light up again.
·
In operation after breakdown repair, error code is not displayed.
The last error code (abnormality) will be saved in IC memory.
The last error code (abnormality) will be saved in IC memory.
·
Timer LED Blinking in Abnormal Operation:
1.
Automatically stops the operation.
2.
Timer LED on display of the indoor unit blinks.
3.
The LED will be off if the unit is turned off or the Error
RESET button on the remote controller is pressed.
RESET button on the remote controller is pressed.
·
To display memorized error (Protective operation) status:
1.
Turn the unit on.
2.
Press the CHECK button on the remote controller for
continuously 5 seconds or more with a pointed object to
appear “--” on the display.
continuously 5 seconds or more with a pointed object to
appear “--” on the display.
3.
Press the “TIMER”
or
button on the remote
controller to appear “H00” on the display. Signal is
transmitted to the main unit.
transmitted to the main unit.
4.
Press the “TIMER”
button (When the
button is
pressed, the display goes back.) repeatedly and slowly until
Beeps sound (about 5 seconds intermittently) is heard from
main unit.
Beeps sound (about 5 seconds intermittently) is heard from
main unit.
5.
Then, displayed error code matches to the error code saved
in unit memory. The power LED on the main unit also lights
up.
in unit memory. The power LED on the main unit also lights
up.
Note: When the CHECK button is pressed
continuously for 5 seconds again, or when no
operation continues for 30 seconds, or when the
RESET button on remote controller is pressed
with a pointed object, the display is cancelled.
continuously for 5 seconds again, or when no
operation continues for 30 seconds, or when the
RESET button on remote controller is pressed
with a pointed object, the display is cancelled.
·
To clear memorized error (Protective operation) status after
repair:
repair:
1.
Press the AUTO button in main unit continuously for
5seconds or more and release it. (Test run / Pump
downoperation: Beep sound)
5seconds or more and release it. (Test run / Pump
downoperation: Beep sound)
2.
Press the CHECK button on remote controller for about 1
second with a pointed object to transmit signal to main unit.
A beep sound is heard from main unit and the data is
cleared.
second with a pointed object to transmit signal to main unit.
A beep sound is heard from main unit and the data is
cleared.
·
Temporary Operation (Depending on breakdownstatus)
1.
Press the ON/OFF button after selecting Cooling or Heating
operation. (Receiving Beep sound is heard andthe TIMER
LED blinks.)
operation. (Receiving Beep sound is heard andthe TIMER
LED blinks.)
2.
The unit can temporarily be used until repaired.
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CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1E
10.6.3.2. Error Code
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CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1E
Symbol
Diagnosis
Diagnosis method
H11 Indoor / Outdoor
abnormal
communication
This error occurs when indoor/outdoor unit communication fails to be established after 30 seconds or more.
<Diagnosis checkpoint>
1. Measure the voltage of the indoor/outdoor unit communication cables, and check whether the voltage is being
supplied properly to the outdoor unit or whether it is being returned from the outdoor unit to the indoor units.
H12 Indoor unit capacity
unmatched
This error occurs when wrong in the total connection capacity and wrong connection in each capacity.
The error is determined within 2 minutes after the power is turned on.
<Diagnosis checkpoint>
1. Check the total capacity of the units connected and check that the models are compatible for connection.
H14 Intake air temp.
sensor
This error occurs when the intake air temperature has exceeded above 46°C continuously for 2 minutes or
dropped below -54°C continuously for 5 seconds during operation.
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circulating (more than 500k ohms) or short-circulating (less than 6.5k ohms)
Check the sensor, and if open-circulating (more than 500k ohms) or short-circulating (less than 6.5k ohms)
is not found, defective contact of the connector is possible.
H16 Outdoor Current
Transformer
When the total current has dropped below the set current level continuously for 20 seconds during operation
beyond the set capacity, operation is stopped. Three minutes later, operation is started up again, and when the
trouble occurs on 4 successive occasions, the error occurs (the timer lamp blinks).
<Diagnosis checkpoint>
1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is extremely low).
2. Check the control P.C. Board: Check for a broken wire (open-circuit) in the current transformer. (If open-
2. Check the control P.C. Board: Check for a broken wire (open-circuit) in the current transformer. (If open-
circuit is found, replace the control P.C. Board.)
In the case of a scroll compressor (DC motor), H16 is detected only when the regular compressor is
In the case of a scroll compressor (DC motor), H16 is detected only when the regular compressor is
operating.
H19 Indoor fan motor
mechanism lock
High-voltage PWM: When a state in which the fan motor speed is not synchronized with the control signal has
been detected on 7 successive occasions:
Low-voltage PAM: When the fan lock detection signal has been detected on 7 successive occasions or it has
been detected continuously for 25 seconds or when a state in which the fan motor speed is not synchronized
with the control signal has been detected on 7 successive occasions:
The error occurs (the timer lamp blinks).
The error occurs (the timer lamp blinks).
<Diagnosis checkpoint>
1. Check the nature of the fan lockup trouble.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the
control P.C. Board.
H21 Indoor float switch
abnormality
Error occurs when the float switch is open for 150 seconds.
<Diagnosis checkpoint>
1. Drain blockage
2. Check the conductivity of float switch.
3. Check that the resistance of the drain motor is about 200 ohms.
2. Check the conductivity of float switch.
3. Check that the resistance of the drain motor is about 200 ohms.
H23 Indoor heat exchanger
temp. sensor
This error occurs when a temperature of under approximately -40°C or above approximately 80°C has been
detected by the heat exchanger temperature sensor continuously for 5 seconds.
(This error is not detected during de-icing.)
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 2.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 2.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H27 Outdoor air temp.
sensor
This error occurs when a temperature of under approximately -40°C or above approximately 150°C has been
detected by the outdoor air temperature sensor for 2 to 5 seconds. (This error is not detected during de-icing.)
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H28 Outdoor heat
exchanger temp.
sensor 1
This error occurs when a temperature of under approximately -60°C or above approximately 110°C has been
detected by the heat exchanger temperature sensor for 2 to 5 seconds. (This error is not detected during de-
icing.)
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
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CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1E
Symbol
Diagnosis
Diagnosis method
H30 Outdoor discharge
pipe temp. sensor
Disconnected discharge sensor
When the condensation temperature is higher than the discharge temperature + (plus) 6°C, a sensor
disconnection is detected, operation stops, and the error occurs (the timer lamp blinks).
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H32 Outdoor heat
exchanger temp.
sensor 2
(discharge pipe temp.)
This error occurs when a temperature of under approximately -60°C or over approximately 110°C has been
detected continuously for 2 to 5 seconds by the outlet temperature sensor of the heat exchanger.
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H34 Outdoor heatsink
temp. sensor
This error occurs when a temperature of under -43°C or above 80°C has been detected by the outdoor unit
radiator fin sensor continuously for 2 seconds.
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H35 Drainage or drain
pump abnormality
This error occurs if the float switch is open three times for 10 seconds or more during a twenty-minute period.
<Diagnosis checkpoint>
1. Drain blockage
2. Check the conductivity of float switch.
3. Check that the resistance of the drain motor is about 200 ohms.
2. Check the conductivity of float switch.
3. Check that the resistance of the drain motor is about 200 ohms.
H36 Outdoor gas pipe
temp. sensor
This error occurs when a temperature of under -45°C or above approximately 149°C has been detected by the
outdoor unit gas side pipe temperature sensor continuously for 2 to 5 seconds.
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H37 Outdoor liquid pipe
temp. sensor
This error occurs when a temperature of under -45°C or above 149°C has been detected by the outdoor unit liquid
side pipe temperature sensor continuously for 2 seconds.
<Diagnosis checkpoint>
1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been
detected.
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not
found, defective contact of the connector or a defective control P.C. Board is possible.
H39 Abnormal indoor
operating unit or
standby units
This error occurs in rooms other than one in which indoor freezing error has occurred when the pipes have been
connected incorrectly, when an outdoor expansion valve is defective or when an expansion valve connector has
become disconnected.
H97 Outdoor fan motor
mechanism lock
When the fan motor speed detected when its maximum output is demanded is below 30 rpm. continuously for 15
seconds, the fan motor stops for 3 minutes and then restarted.
When this happens on 16 occasions (the error is cleared when the value is normal for 5 minutes), the H97
diagnostic symbol is stored in the memory, and the fan motor stops.
<Diagnosis checkpoint>
1. Check the nature of the fan lockup error.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the
control P.C. Board.
H98 Indoor high pressure
protection
The restriction on the compressor frequency is started when the temperature of the indoor unit heat exchanger
source is between 50°C and 52°C, the compressor stops at a temperature from 62°C to 65°C, it is restarted 3
minutes later at below 62°C to 65°C, and the restriction on the compressor frequency is released at a temperature
between 48°C and 50°C. (No error occurs.)
<Diagnosis checkpoint>
1. Check the indoor unit heat exchanger temperature sensor (check for changes in its characteristics and check
its resistance): Symptoms include no hot start when operation is started, a failure of the thermostat to turn on
(no outdoor unit operation). And, frequent repetition of stopping and startup.
2. Check also for short-circuits indoors and clogging of the air filters.
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