Mitsubishi LGH 15-200RX4 Service Manual [eng]
Contents
Safety precautions........................................................................3
1. Specifications ....................................................................... 4-8
2. Dimensions ........................................................................ 9-17
3. Wiring diagrams ............................................................... 18-19
4. Troubleshooting ............................................................... 20-34
4-1 Service Flow.............................................................. 20-21
4-2 Items to Check .......................................................... 22-33
4-3 Circuit Test Point............................................................. 34
5. Overhaul procedures........................................................ 35-39
5-1 Blower Parts.............................................................. 35-36
5-2 Damper Movement Motor Part (All units available)........ 37
5-3 Circuit Board Part...................................................... 37-39
6. Parts list ........................................................................... 40-76
LGH-15RX4-E ............................................................... 41-44
LGH-25RX
4-E ............................................................... 45-48
LGH-35RX
4-E ............................................................... 49-52
LGH-50RX
4-E ............................................................... 53-56
LGH-65RX
4-E ............................................................... 57-60
LGH-80RX
4-E ............................................................... 61-64
LGH-100RX
4-E ............................................................. 65-68
LGH-150RX
4-E ............................................................. 69-72
LGH-200RX
4-E ............................................................. 73-76
♦♦
Turn off the power supply
Be sure to shut off the breaker before disassembling the unit for repair.
(Failure to heed this warning may result in elec-
tric shock.)
♦♦
Use proper parts and tools
For repair, be sure to use the parts listed in the service
parts list of the applicable unit model and
use the proper tools.
(Failure to heed this warning may result in elec-
tric shock, fire and/or bodily injury.)
♦♦
Proper electric work
Use the electric wires designated for electric work, and
conduct electric work in accordance with the "Electric
Installation Engineering Standard," the "Indoor Wiring
Regulations," and the Installation Work
Guide.
(Incomplete connection or wiring installation may
result in electric shock and/or fire.)
♦♦
Replace damaged and/or degraded parts
Be sure to replace the power-supply cord and lead wire
in the event that they are damaged and/or
degraded.
(Failure to heed this warning may result in elec-
tric shock and/or fire.)
♦♦
Check insulation
Be sure to measure the insulation resistance once the
repair work is complete, and turn on the power supply
after verifying that an insulation resistance
of at least 10MΩ is obtained.
(If an insulation problem exists, it may result in
electric shock.)
Safety precautions
●Please be sure to read the following safety precautions thoroughly before commencing with the maintenance
work, and conduct the inspection and repair of the product in a safe manner.
●The types and levels of danger that may arise if the product is handled incorrectly are described by using the
warning symbols shown below.
♦♦
Electric shock
If you must inspect the circuitry while the
power is on, do not touch the live parts.
(Failure to heed this warning may result in elec-
tric shock.)
♦♦
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result in elec-
tric shock, fire and/or bodily injury.)
Incorrect handling of the product may result in serious injury
or death.
♦♦
Caution for bodily injury
Do not conduct any work at a location
where you do not have a sure footing.
(Failure to heed this caution may result in a fall.)
♦♦
Wear gloves
Wear gloves when conducting work.
(Failure to heed this caution may result in injury
to your hands from sharp metal or other edges.)
•Inspect the grounding, and repair it if incomplete.
●Make sure that the product operates correctly upon completion of repair. Clean the product as well as the surrounding area, and then notify the customer of the completion of repair.
Incorrect handling of the product may result in serious injury
or damage to properties including buildings and equipment.
Request during repair
—3—
Warning
Caution for
electric shock
Prohibited
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Caution
Prohibited
Be sure to follow
this instruction.
—4—
1. Specifications
—5—
—6—
—7—
—8—
Unit (mm)
LGH-15RX4-E
2. Dimensions
—9—
Unit (mm)
LGH-25RX4-E
—10—
Unit (mm)
LGH-35RX4-E
—11—
—12—
Unit (mm)
LGH-50RX4-E
Unit (mm)
LGH-65RX4-E
—13—
—14—
Unit (mm)
LGH-80RX4-E
Unit (mm)
LGH-100RX4-E
—15—
—16—
Unit (mm)
LGH-150RX4-E
Unit (mm)
LGH-200RX4-E
—17—
3. Wiring diagrams
LGH-15RX4-E,LGH-25RX4-E,LGH-35RX4-E,LGH-50RX4-E,LGH-65RX4-E,LGH-80RX4-E,LGH-100RX4-E
—18—
LGH-150RX4-E,LGH-200RX4-E
—19—
4. Troubleshooting
4-1 Service Flow
Confirmation items
1 Condition of trouble – remote controller dis-
play, etc.
2 Frequency of trouble – date of start of opera-
tion and occurrence
3 Occurrence timing
4 Existence of drawings, equipment (including
controllers and equipment sold separately),
cables, wiring, and settings.
Applicable models
Lossnay
LGH-15 to 200RX
4-E
Remote controller
PZ-41SLB-E
PZ-52SF-E
Trouble Mode 1 The system will not start properly.
• Check the initialization checklist from
installation to operation (table 1-1).
• Check the system checklist (table 1-2).
Trouble Mode 2
• The check code display appears on the
remote controller.
• The LED of the Lossnay circuit board is
blinking.
Check with the check code list (table 2).
Trouble Mode 3
The remote controller does not operate or
operates irregularly.
The Lossnay does not operate or operates
irregularly.
Trouble Mode 4
Check with the remote controller checklist
(table 3).
Check with the Lossnay checklist (table 4).
Precautions when diagnosing malfunctions
● When removing a transistor or printed circuit board, make sure the breaker is thrown.
● When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force to the surface
mounted parts.
● When removing the circuit board, be careful of the metal edges on the board.
● When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull on the lead
wires.
● When servicing, be sure to recreate the malfunction 2 to 3 times before starting repairs.
● If a malfunction of the printed circuit board is suspected, check for disconnected wires in the print pattern, burnt parts or dis-
coloration.
● If the printed circuit board is replaced, make sure that the switch settings on the new board are the same as the old board.
—20—
Error List
Unit error
——
Error item
—
«
«««
««
«
«««
«
«
—
—
«
—
«««
————
—
—
—
—
« «««
—
—
«« «
«« «
—
«« ««
—
«« «
—
«« «
«
—
«« «
2 times
3 times
4 times
8 times
—
—
—
—
—
—
—
9 times
—
—
—
—
—
6 times
—
—
8 times
1 - 5
times
LED 6
turn off
—
4000/4116
*1)
3602
*2)
5101
3126
0900
6600
6607
6608
6607/6608
6602/6603/
6604
—
6608
• Cancellation
• Cancel damper operation
• Other controls as normal
•
Lossnay ventilation
fixed (for “Auto” modes)
•
Other controls as normal
•
The Pre-heat output
(X8) turns OFF
• Fan: High speed
• Lossnay ventilation fixed
—
—
—
• Cancellation
—
—
• Cancellation
Fan motor
operation
device error
Damper motor
error
OA
temperature
sensor error
Pre-heat error
«««
—
«
5 times —5102
•
Lossnay ventilation
fixed (for “Auto” modes)
•
Other controls as normal
RA
temperature
sensor error
Test operation
Dual address
No ACK
No response
Controller
communication
error
Communication
circuit error
««« ««
9 times —
6801
*3)
• Restricted to ON/OFF
Local transmission cable communication
error
Polarity not set
PZ-41SLB-E
communication error
ClassificationCommunication error
Measures taken by
Lossnay
Remote
controller
display
error
code
LED 1
(green)
Display
(No. of
blinks)
LED 2
(red)
Display
(No. of
blinks)
Error
monitor
output
*4)
Reset
power
supply
Change
address
Stop
↓
Start
Error
delete
Cancellation measures
*1) “4000” is displayed on PZ-41SLB-E only.
*2) This error is not generated in the LGH-150RX
4, LGH-200RX4 model.
*3) “6801” is displayed on the M-NET controllers only.
*4) Since the error monitor output will turn into the preheat output if SW5-6 is turned ON, it becomes impossible to use it.
—21—
Do the capacity of the main power supply on/off unit and wiring span meet specification?
Checkpoint
1
No.
2 Is the specified power supplied to the Lossnay power terminal (TM1)?
3 Is the wiring length of the transmission cable within specifications?
When using PZ-41SLB-E: Overall extension within 500 m
When using M-NET: Maximum power supply length within 200 m, maximum distance between ends
within 500 m
4 Does the transmission cable meet regulations? (Type, diameter)
5 Is the transmission cable wired at least 5 cm away from the power supply cable?
6 Are multiple transmission or signal cables wired to the same power cable duct?
7 Are multiple transmission cables wired with multi core cables?
8 Is the transmission cable connected to the terminal unit?
(PZ-41SLB-E to TM4 1, 2; M-NET to TB5
A , B )
9 Is the transmission cable securely connected to the Lossnay terminal unit?
10 When not using M-NET
If using 1 Lossnay unit, is the Main/Sub change switch (SW1) on the Lossnay circuit board set to “Main”?
If using 2 or more Lossnay units, is the Main/Sub switch set to “Main” on only one unit, and the other units are set
to “Sub”?
11 When using M-NET
Is the address switch on the Lossnay circuit board (SA1, SA2) set to the correct number?
12 When using external control input
Do the specifications of the external signal match specifications of signals that can be input to the Lossnay?
13 When the external input signal is a pulse signal
Is the pulse input switch (SW2-2) on the Lossnay circuit board set to ON?
14 When the external signal is 12V DC, 24V DC, or Mr. Slim (A-control or K-control) signal
Is it connected to 1, 2 on the Lossnay external control input terminal unit (TM2)?
15 When the external signal is an uncharged a-contact signal
Is it connected to 1, 3 on the Lossnay external control input terminal unit (TM2)?
16 When M-NET is not being used
Is the external input signal connected to the Lossnay set to “Main”?
17 Is the signal cable length within wiring specifications?
12V DC, 24V DC signal: Within limitation of the external device
Uncharged a-contact signal: Within 500 m
Mr. Slim (A-control or K-control) signal: Within 500 m
18 Is the signal cable wired at least 5 cm away from the power supply cable?
19 Is the output capacity of the Lossnay operation monitor/malfunction monitor (pre-heat output) within specifications?
Operation monitor output: Maximum 240V AC/24V DC 2A, minimum 220V AC/5V DC 100 mA
Maifunction monitor output/pre-heat output:Maximum 240V AC/24V DC 2A, minimum 220V AC/5V DC100 mA
20 Are the power supply cable, transmission cable, signal cable, etc., securely connected to the proper terminals?
21 Are the settings for the Mai/Sub switch, address switch, and function select switch correct?
4-2 Items to Check
(1)Trouble Mode 1: The system will not start properly.
Initialization checklist from installation to operation (Table 1-1)
After checking the system, check the points below up to operation.
—22—
22 When pre-heat output output is used, turn the SW5-6 ON.
There is no method of turning ON the pre-heat output without changing OA temperature.
The first check of the installation
(1) Make the power supply of the heater turned off.
(2) Short-circuit the pre-heater output with a lead etc.
(3) Check weather the relay contact by the side of the heate rturns on.
The pre-heat output is never closed even if abnormalities, such as drawing out the OA/RA thermistor connector,
occur.
« Check the power supply to the
Lossnay.
« Set the Main/Sub (SW1) switch
to “Main.”
« Check the length of the trans-
mission cable wiring.
« Connect the transmission cable
to TM4 12.
« Change to the PZ-41SLB-E
remote controller.
1
No.
Remote controller
display does not
appear.
« Power is not supplied to the Lossnay, or power
outside specifications is connected.
« When using only 1 Lossnay, the Main/Sub switch
(SW1) on the Lossnay circuit board is set to “Sub.”
« The overall wiring length of the transmission cable
is longer than specifications (longer than 500 m).
« The remote controller is connected to TB5 (M-NET
transmission cable).
« PZ-52SF-E is connected to the Lossnay local
remote controller.
2 Remote controller
does not operate
(Communication error
display)
« When using multiple Lossnay units, the Main/Sub
switch (SW1) on the Lossnay circuit board of the
second or following unit is set to “Main.”
« The overall wiring length of the transmission cable
is longer than specifications (longer than 500 m).
« Multiple transmission cables are wired with multi
core cables.
«
Set the Main/Sub switch (SW1) of
the second and following Lossnay
units to “Sub.”
« Check the length of the trans-
mission cable wiring.
« For the applied transmission
cable, wire the transmission
cables away from the other
transmission cable.
3 Interlocked operation
with external device
does not occur.
« The type of external signal does not match the
connected terminal unit (charged, uncharged, Mr.
Slim signal).
« The type of external signal does not match the
pulse input switch (SW2-2) setting (level signal,
pulse signal).
« The external device signal is not being input.
« The external device and signal cable wiring is
longer than specifications
12V DC, 24V DC: Longer than limitations of
external device
Uncharged a-contact: Longer than 500 m
Mr. Slim signal: Longer than 500 m
« The Delayed Start mode is set at the remote con-
troller (PZ-41SLB-E).
« The ON Interlocked Operation mode or OFF
Interlocked Operation mode is set at the remote
controller (PZ-41SLB-E).
« When using multiple Lossnay units, the external
control input signal is connected to a unit with the
“Sub” setting made.
«
Check the connection to the external control input terminal (TM2) for
the type of external signal.
«
Check the type of external signal
and the setting of the pulse input
switch (SW2-2).
« Check the external device.
« Check the length of the signal
cable wiring.
« Check the Delayed Start mode
setting at the remote controller
(PZ-41SLB-E).
« Check the Interlocked Operation
mode setting at the remote controller (PZ-41SLB-E).
« Connect the external control
input signal to the Lossnay unit
set to “Main.”
Symptom Cause Corrective action
System checklist
1Use this checklist when using a PZ-41SLB-E or an external device (Table 1-2-1)
—23—
Checkpoint
No.
« Turn the SW5-6 ON.
« Operate onry below -5˚C.
4
No.
Pre-heat control does
not work.
« SW5-6 is OFF.
« OA temprature is larger than -5˚C.
Symptom Cause Corrective action
2System checklist when using the M-NET (Table 1-2-2)
« Check the Lossnay address, and
set for an address corresponding to interlocked operation.
« Check the length of the trans-
mission cable wiring.
«
Change to the PZ-52SF-E remote
controller (PZ-41SLB-E can not
be used with the M-NET).
1
No.
Does not interlock with
City Multi. (The Lossnay
cannot be operated by
the ventilation switch on
the ME remote controller,
MA remote controller, or
MELANS.)
« The Lossnay is not set for interlocked opera-
tion, or is set for interlocked operation at the
wrong address.
« The length of the M-NET transmission cable
wiring from the outdoor unit or the system’s
overall wiring length is longer than specifications. (Longer than 200 m from the outdoor
unit, longer than 500 m between ends.)
« PZ-41LSB-E is connected to the Lossnay local
remote controller.
Symptom Cause Corrective action
2 Cannot operate using the
MELANS or Lossnay
remote controller.
« The address that has been set for the group in
MELANS and the address for the Lossnay are
different.
« The length of the M-NET transmission cable
wiring from the power supply unit or the system’s overall wiring length is longer than specifications. (Longer than 200 m from the power
supply unit, longer than 500 m between ends.)
« PZ-41LSB-E is connected to the Lossnay local
remote controller.
« Check the registered address in
MELANS.
« Check the length of the trans-
mission cable wiring.
«
Change to the PZ-52SF-E remote
controller (PZ-41SLB-E can not be
used with a M-NET system).
3 A unit should operate
independently by
MELANS or the Lossnay
remote controller, but it
interlocks with another
City Multi unit.
« It has been set for interlocked operation with
the City Multi unit.
« Cancel the interlocked operation
setting.
4 Cannot perform group
settings for the Lossnay
using MELANS, ME
remote controller, or MA
remote controller. (The
remote controller shows
“88” at the time of registration.)
« Power is not supplied to the Lossnay, or power
outside specifications is connected.
« The M-NET transmission cable is connected to
TM4 12.
« The transmission cable is not properly con-
nected to the MELANS or the City Multi.
«
The length of the transmission cable wiring is longer than
specifications (longer than maximum 200 m from the
power supply unit, longer than 500 m between
ends.)
«
Check the power for the Lossnay
and perform the registration again.
« Connect the transmission cable
to TB5
A , B .
« Check the transmission cable
connection.
« Check the length of the trans-
mission cable wiring.
—24—
5 When power is supplied
to the system, the
Lossnay remote controller continues to display “HO” and does not
start. (Group registration
information disappears.)
« The Group setting was made on a Lossnay
remote controller in a system connected to a
system controller.
« The length of the transmission cable wiring is
longer than specifications (longer than maximum 200 m from the power supply unit, longer
than 500 m between ends.)
«
In a system connected to MELANS,
make the group setting with the
MELANS (Do not make the group setting with the Lossnay remote controller).
« Check the length of the trans-
mission cable wiring.
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