Test Run; Before Test Run; Test Run Procedures - Mitsubishi Electric PEH-RP250MYA Installation Manual

Connectors (connections when shipped
from the factory are for indoor unit
controller board power supplied from
outdoor unit)
Fan motor
L1
L2
L3
ORANGE
CND
N
S1
Indoor unit
S2
controller
S3
board
Indoor unit controller board power supplied
from outdoor unit (when shipped from factory)

11. Test run

11.1. Before test run

The test run can be carried out either from the outdoor unit or the indoor unit.
1. Checklist
•
After the installation, piping setup, and wiring of the indoor and outdoor units is
complete, check that refrigerant is not leaking, the power and control wires are
not loose, and the poles are not reversed.
•
Use a 500 V insulation resistance tester to make sure that the resistance be-
tween the power terminal and the ground is 1.0 MΩ or more. If it is less than
1.0 MΩ, do not operate the unit. * Absolutely do not touch the tester to indoor/
outdoor connection terminals S1, S2, and S3. An accident could occur.
•
Make sure there is no malfunction in the outdoor unit. (If there is a malfunction,
you can diagnose it using LED1 on the board.)
•
Check that the ball valve is fully open on both the liquid and gas ends.
•
Check the electrical power phase. If the phase is reversed, the fan may rotate
in the wrong direction or stop, or unusual sounds may be produced.
•
Starting at least 12 hours before the test run, send current through the
crankcase heater. (If the current is running for a shorter period of time,
damage to the compressor could result.)
• For specific models requiring changing of settings for higher ceilings or selec-
tion of power supply ON/OFF capability, make proper changes referring to the
description for Selection of Functions through Remote Controller.
After the above checks are complete, carry out the test run as indicated in the
following outline.

11.2. Test run procedures

1) Indoor unit
Operating procedures
1 Turn on the main power supply
While the display on the remote controller indicates "
is disabled. Turn off the " " indicator before using the remote controller.
"CENTRALLY CONTROLLED"
indicator
2 Press the [TEST] button twice successively within three seconds. Test
run starts.
"TEST RUN" and "OPERATION MODE" are displayed alternately.
3 Press [ ] button
Cooling/drying mode: Cool air should start to blow.
Heating mode: Warm air should start to blow (after a while).
16
If the indoor unit
controller board
power supplied from
indoor unit, change
the connections of
the connectors as
shown in the following
figure.
Fan motor
Connectors
L1
L2
L3
ORANGE
CND
N
Indoor unit
S1
controller
S2
S3 board
Indoor unit controller board power
supplied from indoor unit
", the remote controller
˚C
˚C
TEMP. ON/OFF
• For this wiring connection method, indoor and outdoor unit connection (S2,
S3) wiring thickness can be a minimum of 0.3 mm
be extended up to a maximum of 120 m.
Location of cable holes
[Fig. 10.0.3] (P.5)
A For remote controller cables
B For outdoor unit connection cables
Switching the external static pressure
The unit has been set at the factory so that the standard amount of air is
provided when the static pressure outside the unit is 50 Pa. However, it is
possible to change the motor torque so that the standard amount of air is
provided when the static pressure outside the unit is 150 Pa. This can be done
by removing the white connector and connecting the red one (both connectors
are provided inside the control box) as shown below.
[Fig. 10.0.4] (P.5)
A White connector (50 Pa) C01
C Remove
4 Check the outdoor unit fan for correct running
The outdoor unit features automatic capacity control to provide optimum fan
speeds. The fan keeps running at a low speed to meet the current outside air
condition unless it exceeds its available maximum power. Then, in actuality,
the fan may stop or run in the reverse direction depending on the outside air,
which does not mean malfunction.
5 Press the [ ON/OFF] button to reset the test run in progress
• The test run will be automatically shut down after two hours in response to the
AUTO STOP setting of two hours on the timer.
• During the test run, the room temperature display shows the indoor unit tubing
temperatures.
• In the case of the test run, the OFF timer will activate, and the test run will
automatically stop after two hours.
• The room temperature display section shows the control temperature for the
indoor units during the test run.
• Check that all the indoor units are running properly for simultaneous twin and
triple operation.
Malfunctions may not be displayed even if the wiring is incorrect.
6 Register a telephone number
The telephone number of the repair shop, sales office, etc., to contact if an
error occurs can be registered in the remote controller. The telephone number
will be displayed when an error occurs.
For registration procedures, refer to 9.4 Function selection of remote control-
ler.
Operation mode display
"TEST RUN" and "OPERATION MODE" are
displayed alternately.
Timer stops test run after two hours.
˚C
Piping temperature display
TEMP. ON/OFF
Stop test run by pressing the [
MENU ON/OFF FILTER
During test run, the RUN lamp remains on.
BACK MONITOR/SET DAY CHECK TEST
PAR-21MAA CLOCK OPERATION [TEST] button
CLEAR
[
(*1)
After turning ON the power, the system will go into startup mode, and the remote
controller operation lamp (green) and the display section's "PLEASE WAIT" will
flash. Also, in the case of the indoor substrate LEDs, LED 1 and LED 2 light up
(when address is 0) or become dim (when address is not 0), and LED 3 flashes. In
the case of the outdoor substrate LED display,
alternatively at 1-second intervals.
• If one of the above operations does not function correctly, the following causes
should be considered, and if applicable, dealt with. (The following symptoms
have been determined under test run mode. Note that "startup" in the chart
means the *1 display above.)
2 and wiring connection can
C For power supply cables
B Red connector (150 Pa) C02
ON/OFF] button.
] button
and are displayed