74
10-13. Test Run
Using the control unit
(1) Change the indoor control unit switch from “ON”
→
“TEST”.
(The outdoor unit will not operate for 3 minutes after the power is turned ON
and after operation is stopped.)
(2) All the indicator lamps blink while the test run is in progress.
(3) Temperature control is not possible during the test run.
(4) If correct operation is not possible, the trouble will be indicated by the
indicator lamps. Refer to “Table of Self Diagnostic Functions and Correc-
tions” and correct the problem.
(5) After the test is completed, change the control unit switch from “TEST”
→
“ON”. Confirm that the indicator
lamps have stopped blinking. (A function is included which cancels the test run after a 60-minute timer has
elapsed, in order to prevent continuous test run operation.)
●
This mode places a large load on the devices. Use it only for performing test runs.
●
A test run is not possible if the power is turned ON with the switch in the TEST position.
After the power has been turned ON, change the switch once to ON or OFF, then switch it back to the TEST
position.
10-14. Precautions
●
Request that the customer be present when the test run is performed. At this time, explain the operation manual
and have the customer perform the actual steps.
●
Be sure to pass the manuals and warranty certificate to the customer.
●
Check that the AC 220 – 240 V wiring is not connected to the inter-unit control wiring connector terminal.
*
If AC 220 – 240 V is accidentally applied, the indoor or outdoor unit control PCB fuse (0.5 A for both indoor and
outdoor units) will blow in order to protect the PCB. Correct the wiring connections, then disconnect the 2P con-
nectors (indoor: blue) (outdoor: blue, serial 1) that are connected to the PCB, and replace them with 2P con-
nectors (indoor: brown) (outdoor: brown, serial 2).
(Refer to the figure below.) If operation is still not possible after changing the brown connectors, try cutting the
varistor (black) (both indoor and outdoor).
(Be sure to turn the power OFF before performing this work.)
NOTE
2 HP
2P connector (blue)
2P connector (blue)
Fuse (0.5A)
Fuse (0.5A)
CHK (2P plug)
CHK (2P plug)
SW103
ON
OFF
TEST
SW103
TEST
ON
OFF
2P connector (brown)
2P connector (brown)
Varistor (black)
VA002
Varistor (black)
VA002
Indoor unit control PCB
3 HP
Indoor unit control PCB
Fig. 10-12
Outdoor unit control PCB
Varistor (black)
Fuse
VA002
Serial 1 (blue)
connector
0.5A
Terminal plug (black)
3 ~ 5 HP
Serial 2 (brown) connector
ON
OFF
TEST
Indoor control unit switch
OPERATION TIMER STANDBY
Indicator lamps
04-393 DC INV Tech p 64-110 12/13/04 11:35 AM Page 74