Troubleshooting - Mitsubishi Electric CITY MULTI PUMY-P200YKM2R2 Technical & Service Manual

8

TROUBLESHOOTING

8-1. CHECKPOINTS FOR TEST RUN
8-1-1. Procedures before test run
(1) Before a test run, make sure that the following work is completed.
• Installation related:
Make sure that the panel of cassette type and electrical wiring are done.
Otherwise electrical functions like auto vane will not operate normally.
• Piping related:
Perform leakage test of refrigerant and drain piping.
Make sure that all joints are perfectly insulated.
Check stop valves on both liquid and gas side are fully open.
• Electrical wiring related:
Check ground wire, transmission cable, remote controller cable, and power supply cable for secure connection.
Make sure that all switch settings of address or adjustments for special specification systems are correctly settled.
(2) Safety check:
With the insulation tester of 500V, inspect the insulation resistance.
Do not touch the transmission cable and remote controller cable with the tester.
The resistance should be over 1.0 MΩ. Do not proceed inspection if the resistance is less than 1.0 MΩ.
Inspect between the outdoor unit power supply terminal block and ground first, metallic parts like refrigerant pipes or the
electrical box next, then inspect all electrical wiring of outdoor unit, indoor unit, and all linked equipment .
(3) Before operation:
a) Turn the power supply switch of the outdoor unit to on for compressor protection. For a test run, wait at least 12 hours
from this point.
b) Register control systems into remote controller(s). Never touch the on/off switch of the remote controller(s). Refer to ˝7-2.
Special Function Operation and Settings (for M-NET Remote Controller)˝ as for settings. In MA remote controller(s), this
registration is unnecessary.
(4) More than 12 hours later from power supply to the outdoor unit, turn all power switch to on for the test run. Perform test run
according to the ˝Operation procedure˝ table of the bottom of this page. While test running, make test run reports .
8-1-1-1. Test run for M-NET Remote controller
When you deliver the unit after the test run, instruct the end user for proper usage of the system using owners' manual
and the test run report you made to certificate normal operation. If abnormalities are detected during test run, refer to ˝8-1-
2 Countermeasures for Error During Test Run˝. As for DIP switch setting of outdoor unit, refer to ˝8-5. INTERNAL SWITCH
FUNCTION TABLE˝.
Test run
Address Remain 2:00
00
1
＞
ON
(a) Read the section about Test run in the indoor unit Installation Manual before performing a test run.
(b) During the test run, indoor units will be forced to operate in the Thermo-ON status.
Except the set temperature, normal operation functions are accessible during test run.
(c) By selecting the address of another indoor unit, the liquid pipe temperature of the selected unit can be monitored.
(d) The test run will automatically end in two hours.
* When AHC is controlled from the controller
To monitor the operating status of AHC, touch the [<] button on the [Test run] screen and
access the [General equipment] screen.
To set the humidity setting for the humidifier (when one is connected to the AHC),
touch the [>] button on the [Indoor unit setting] screen.
OCH675E
[MON] 10:45
LED
Pipe
-
+
9.0°C
＞
Cool
Mode
[Test run screen]
Test run
Fan speed
＞
＞
＞
Auto
Louver
＞
＞
On
[Indoor unit setting screen]
41
Air direction
＞
＞
＞
Swing
LOSSNAY
＞
＞
High