Panasonic CS-RZ25TKR, CS-RZ35TKR, CU-RZ25TKR Troubleshooting Manual

Also See for CS-RZ25TKR:

Operating instructions manual (16 pages)

Service manual (196 pages)

Table of Contents

Contents

1 Troubleshooting
- 1.1 When...
  - 1.1.1 NON SERVICEABLE CRITERIAS
- 1.2 Error code
2 Documents / Resources
- 2.1 Download manual

Panasonic CS-RZ25TKR, CS-RZ35TKR, CU-RZ25TKR Troubleshooting Manual

Troubleshooting

The following symptoms do not indicate malfunction.

Symptom	Cause
POWER indicator blinks before the unit is switched on.	This is a preliminary step in preparation for the operation when the ON timer has been set. When ON Timer is set, the unit may start earlier (up to 35 minutes) before the actual set time in order to achieve the desired temperature on time.
POWER indicator blinks during HEAT mode with no warm air supply (and flap is closed).	The unit is in defrost mode (and AIR SWING is set to AUTO).
TIMER indicator is always on.	The timer setting repeats daily once set.
Operation is delayed a few minutes after restarting.	The delay is a protection to the unit's compressor.
Indoor fan stops occasionally during heating operation.	To avoid unintended cooling effect.
Indoor fan stops occasionally during automatic fan speed setting.	This helps to remove the surrounding odour.
Airflow continues even after operation has stopped.	Extraction of remaining heat from the indoor unit (maximum 30 seconds).
The room has a peculiar odour.	This may be due to damp smell emitted by the wall, carpet, furniture or clothing.
Cracking sound during operation.	Changes of temperature caused the expansion/ contraction of the unit.
Water flowing sound during operation.	Refrigerant flow inside the unit.
Mist emerges from indoor unit.	Condensation effect due to cooling process.
Outdoor unit emits water/steam.	Condensation or evaporation occurs on pipes.
Louder noise at outdoor unit during early operation of i AUTO-X.	The compressor and fan rotate at higher speed to boost cooling performance during initial operation.
Discoloration of some plastic parts.	Discoloration is subject to material types used in plastic parts, accelerated when exposed to heat, sun light, UV light or environmental factor.

Check the following before calling for servicing.

Symptom	Check
Operation in HEAT/COOL mode is not working efficiently.	Set the temperature correctly. Close all doors and windows. Clean or replace the filters. Clear any obstruction at the air inlet and air outlet vents.
Noisy during operation.	Check if the unit has been installed at an incline. Close the front panel properly.
Remote control does not work. (Display is dim or transmission signal is weak.)	Insert the batteries correctly. Replace weak batteries.
The unit does not work.	Check if the circuit breaker is tripped. Check if timers have been set.
The unit does not receive the signal from the remote control.	Make sure the receiver is not obstructed. Certain fluorescent lights may interfere with signal transmitter. Please consult authorised dealer.

When...

The remote control is missing or a malfunction has occurred

Raise the front panel.
Press the button once to use in i AUTO-X mode.
Press and hold the button until you hear 1 beep, then release to use in forced COOL mode.
Repeat step 3. Press and hold the button until you hear 2 beeps, then release to use in forced HEAT mode.
Press the button again to turn off.

The indicators are too bright

To dim or restore the unit's indicator brightness, press and hold for 5 seconds.

Conducting a seasonal inspection after extended non-use

Check the remote control batteries.
Check that there is no obstruction around the air inlet and outlet vents.
Use Auto OFF/ON button to select COOL/HEAT operation. After 15 minutes of operation, it is normal to have the following temperature difference between the air inlet and outlet vents:

The units are not going to be used for a long period of time

Activate HEAT mode for 2~3 hours to remove moisture left in the internal parts thoroughly to prevent mould growth.
Turn off the power supply and unplug.
Remove the remote control batteries.

NON SERVICEABLE CRITERIAS

TURN OFF THE POWER SUPPLY AND UNPLUG then please consult an authorised dealer when in following conditions:

Abnormal noise during operation.
Water/foreign particles have entered the remote control.
Water leaks from Indoor unit.
Circuit breaker switches off frequently.
Power cord becomes unnaturally warm.
Switches or buttons are not functioning properly.

How to retrieve error codes

If the unit stops and the TIMER indicator blinks, use the remote control to retrieve the error code.
How to retrieve error codes

• For certain errors, you may restart the unit for limited operation if there are 4 beeps when operation starts.

Error code

Diagnostic display	Abnormality/Protection control
H 00	No memory of failure
H 11	Indoor/outdoor abnormal communication
H 12	Indoor unit capacity unmatched
H 14	Indoor intake air temperature sensor abnormality
H 15	Outdoor compressor temperature sensor abnormality
H 16	Outdoor current transformer (CT) abnormality
H 17	Outdoor suction temperature sensor abnormality
H 19	Indoor fan motor mechanism lock
H 21	Indoor float switch operation abnormality
H 23	Indoor heat exchanger temperature sensor 1 abnormality
H 24	Indoor heat exchanger temperature sensor 2 abnormality
H 25	Indoor ion device abnormality
H 26	Minus ION abnormality
H 27	Outdoor air temperature sensor abnormality
H 28	Outdoor heat exchanger temperature sensor abnormality
H 30	Outdoor discharge pipe temperature sensor abnormality
H 31	Abnormal swimming pool sensor
H 32	Outdoor heat exchanger temperature sensor 2 abnormality
H 33	Indoor/outdoor misconnection abnormality
H 34	Outdoor heat sink temperature sensor abnormality
H 35	Indoor/outdoor water adverse current abnormality
H 36	Outdoor gas pipe temperature sensor abnormality
H 37	Outdoor liquid pipe temperature sensor abnormality
H 38	Indoor/outdoor mismatch (brand code)
H 39	Abnormal indoor operating unit or standby units
H 41	Abnormal wiring or piping connection
H 50	Ventilation fan motor locked
H 51	Ventilation fan motor locked
H 52	Left-right limit switch fixing abnormality
H 58	Indoor gas sensor abnormality
H 59	Eco sensor abnormality
H 64	Outdoor high pressure sensor abnormality
H 67	nanoe abnormality
H 70	Light sensor abnormality
H 71	DC cooling fan inside control board abnormality
H 72	Abnormality tank temperature sensor
H 97	Outdoor fan motor mechanism lock
H 98	Indoor high pressure protection
H 99	Indoor operating unit freeze protection
F 11	4-way valve switching abnormality
F 16	Total running current protection
F 17	Indoor standby units freezing abnormality
F 18	Dry circuit blocked abnormality
F 87	Control box overheat protection
F 90	Power factor correction (PFC) circuit protection
F 91	Refrigeration cycle abnormality
F 93	Outdoor compressor abnormal revolution
F 94	Compressor discharge pressure overshoot protection
F 95	Outdoor cooling high pressure protection
F 96	Power transistor module overheating protection
F 97	Compressor overheating protection
F 98	Total running current protection
F 99	Outdoor direct current (DC) peak detection