Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 81

Outdoor Unit
2.4.7 Servicing Function
2.4.7.1 Emergency Operation
2.4.7.2 Simulated Operation Function
When a malfunction occurs in the following thermistors, simulated operation is carried out while
the malfunction is displayed on the remote controller.
(In case of a fin thermistor malfunction, error display appears only when the INSPECTION/
TEST Operation button on the remote controller is pushed.)
* In case of a malfunction in the low pressure sensor, high pressure sensor, discharge pipe
2.4.7.3 Test Operation Control
70
No transmission between outdoor and indoor units available
A cycle of a 20-minute operation and a 10-minute stop is repeated in cooling operation.
Defrosting operation is performed once in 1 hour in heating operation.
Other controls are same as those performed in normal operation.
Outside air thermistor
Outside heat exchanger thermistor
Fin thermistor
thermistor (for inverter), thermistor for subcooling heat exchanger or suction pipe thermistor,
a malfunction stop is made and no simulated operation is performed.
Cooling operation in the "Test operation mode" is always carried out for 3 minutes in the first
operation after installation.
When the "Test operation" button on the remote controller or the outside PC board is turned
ON, forced thermostat ON operation is performed.
·
Cooling
&
·
First operation after installation
·
Heating
&
·
First operation after installation
·
Cooling (heating)
·
Second or later operation after installation
&
·
Remote controller "Test operation" ON
·
OR
·
Outdoor PC board "Test operation" (BS4) ON
In the "test operation mode", instant malfunction confirmation is conducted to detect a failure
in field installation, such as a stop valve is not open. When malfunction code "U0" is
displayed, check the field installation conditions such as a stop valve is not open.
Normal operation starts automatically 3 minutes after the start of test operation.
If the "test operation mode" is set with the remote controller, cooling operation continues in
the test operation mode.
If the test operation mode is cancelled after an elapse of 3 minutes from the start of test
operation, it is switched to normal operation.
(This control is implemented again in the first operation after refrigerant recovery by the
pump down switch.)
Cooling operation in
→
test operation mode
(approx. 3 minutes)
Heating operation in
→
test operation mode
(approx. 3 minutes)
Cooling (heating)
operation (approx. 30
→
minutes) with forced
thermostat ON
SiBE26-701
Normal cooling
→
operation after 3
minutes
Normal cooling
→
operation after 3
minutes
Normal cooling
→
(heating) operation
Function and Operation