Panasonic CS-ME10DTEG, Service Manual, Page: 93 / 136

Symbol Diagnosis Diagnosis method
H30 Outdoor discharge
pipe temp. sensor Disconnected discharge sensor
•
When the condensation temperature is higher than the discharge tempe (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
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
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
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.
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
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
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
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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