What Service Checker Can Do SiE30-408
2. What Service Checker Can Do
1. The Service Checker makes it possible to make the pass/fail judgment on and check the performance of functional parts in the following cases.
(Thermistor, pressure sensor, solenoid valve, and four-way valve)
You should know temperature (or pressure) detected by the thermistor (or pressure sensor):
You should check whether or not there is a difference between the temperatures measured and detected:
You should check to be sure instructions to energize the solenoid valve (four-way valve) are provided:
You should check to be sure the solenoid valve (four-way valves) operates according to instructions provided from the control unit:
2. The Service Checker Operations makes it possible to check the operating conditions of each operation control in the following cases.
(Operation mode, stepping down/protective control, and retry control)
You should know to what operation mode (i.e., cooling or heating mode) the equipment is set:
As the compressor operating frequency does not increase, you should check whether any stepping down control is in progress.
As the equipment repeats ON-OFF operations, you should check whether any retry control is in progress.
3. The Service Checker makes it possible to check the conditions of and operate indoor units in the following cases.
(The Service Checker Type3 enables the operation equal to that accomplished with centralized controllers: With DIII-NET connected.)
You are able to check whether the compressor operating frequency is set to low or the number of indoor units with thermostat turned ON is less than required.
Even though you are unable to enter the room due to the customer's convenience, you are able to check the performance data of indoor unit.
You should increase the number of indoor units to be operated or the set temperature.
4. The Service Checker enables the simultaneous collection of data on multiple systems in the following cases: With DIII-NET connected.
You should make a data comparison between defective systems and normal systems.
You should collect data in a lump at the time of maintenance.
5. The Service Checker enables the collection of DIII data (transmission data) in the following cases: With DIII-NET connected.
You are not able to rectify the malfunctions in transmission. Therefore, you should check the transmission data.
6. The Service Checker enables troubleshooting in places other than on site through saving and verifying data collected, in the following cases.
As you were able to rectify failures on site, you should check the data when you get back to office.
You should present the data as information to be appended to a report for the customer.
130 Service Checker Type3 Application Edition
SiE30-408
To Conduct
Analysis
What Service Checker Can Do
If you collect or analyze data on the Service Checker:
First of all, make the pass/fail judgment on functional parts.
For accurate data collection, be sure to check the functional parts for any problem.
Case example: Even though the thermistor showed a normal value at an ambient temperature, the detection data got out of order with increasing temperature.
(Particularly, in order to collect data on products manufactured in many years ago, give consideration to the case example aforementioned.)
Focus much attention on the quotient of "Condensing temperature / Evaporating temperature" rather than that of "High pressure / Low pressure".
The Service Checker expresses the quotient of "High pressure / Low pressure" in a value through converting the quotient into the pressure equivalent saturation temperature and uses it as the target value for the capacity control. Therefore, it is immediately obvious whether or not the target temperature is achieved.
Check "each stepping down and protective control" for the operating conditions and look at why this control is performed.
Each stepping down and protection control is used to ensure reliability, not to protect malfunctions.
For example, do not determine that "the system does not cool (or heat) due to the activation of the control". Verify why the control is activated, referring to other data.
Are "discharge superheated degree and suction superheated degree" kept at proper levels, respectively?
Most of malfunctions in compressors result from "wet operation". Referring to the diagnosis procedure on the preceding page, check to be sure the discharge and suction superheated degrees are kept at proper levels.
Data on indoor units
Data on temperatures and motorized valve opening degrees of indoor units are updated every five minutes. By contrast, data on outdoor units are updated earlier than that. As a result, even though data on outdoor units are able to be collected, the data on indoor unit is not synchronized with that while in malfunction. (Performance data and ON/OFF operation data are updated on an as-needed basis.
In order to verify the data on indoor units, be sure to give consideration to the said point.
* The time to store data in the Service Checker follows the PC clock.
Before using the Service Checker, be sure to set the PC clock to the real time.
Service Checker Type3 Application Edition 131
What Service Checker Can Do SiE30-408
Click here to record d
a
t
a
.
Click here to pl
a
y
ba
ck d
a
t
a
recorded.
Thi
s
repre
s
ent
s
the ver
s
ion of the
Checker in
us
e.
The ver
s
ion
s
ho
u
ld
b
e
u
pgr
a
ded to connect to
a
new model.
Procedure
Select and click an applicable item on the main menu.
Regi a
S s re di tered C s pl elect the regi thi s Li s t.
a us s tomer N yed here.
tered C a us me s ( S ite N tomer N a a me me in s )
Click here for tempor a ry recording.
D a t a i s overwritten.
U s e thi s if the C us tomer N a me regi s tr a tion h as a lre a dy b een m a de.
Click here to m a ke C us tomer
N a me ( S ite N a me) regi s tr a tion.
Procedure
Click on the Customer Name (Site Name) registration tab.
If the Customer Name registration has been made, click on the “Select customer” and select a Customer Name in the list displayed on the window.
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SiE30-408 What Service Checker Can Do
• C
us
tomer ID
• C
us
tomer (
S
ite N
a
me) regi
s
tr
a
tion
Enter the d
a
te of regi
s
tr
a
tion for C
us
tomer ID in
a
lph
a
n
u
meric ch
a
r
a
cter
s
.
The C
us
tomer N
a
me c
a
n
b
e entered in “
a
lph
ab
et
”
.
Be
su
re to enter the
s
e two item
s
.
Procedure
Register the Customer ID and Customer Name (Site Name).
For the registration, only enter the Customer ID and Customer Name. For any other items, enter them as needed.
For
a
new c
us
tomer
Click on the
“
NEW
”
t
ab
.
Service Checker Type3 Application Edition 133
What Service Checker Can Do SiE30-408
For
a
project with C
us
tomer N
a
me regi
s
tered
If there i
s a
ny
s
y
s
tem previo
us
ly regi
s
tered, click on the
“
OK
” bu
tton to
s
elect the
s
y
s
tem.
In order to record
a
new
s
y
s
tem, click on the
“
NEW
” bu
tton.
A regi
s
tered
s
y
s
tem i
s
di
s
pl
a
yed here.
S
elect the
s
y
s
tem from thi
s b
ox.
Procedure
Register the system.
Select menu “For a new customer” or “For a project with Customer Name registered”.
Enter the
s
y
s
tem n
a
me regi
s
tr
a
tion.
To
us
e DIII-NET (F1, F2 entry), check the DIII-NET.
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SiE30-408 What Service Checker Can Do
To
us
e in PC
b
o
a
rd connection
Check
“
PCB connection
” a
nd highlight
a
n
a
pplic
ab
le model in the li
s
t of Typic
a
l model
s
election.
Procedure
Select the method of registering and connecting systems.
Enter the “System Name” and then select the “Connecting Method”.
For the connecting method, check either “DIII-NET” or “PCB connection”.
Be
su
re to get permi
ss
ion from the c
us
tomer
a
nd then click
“
Ye
s”
.
If you attempt to record data through the use of DIII-NET (F1, F2 connection), the warning above will appear on the window.
In this case, clicking on the “Yes” will stop all systems connected to the DIII-NET for a period of several minutes, which has ever resulted in a claim regarding the server room of hospital.
If the Checker is connected to any other systems via Outdoor-Outdoor transmission besides the system of outdoor units connected, these other systems will go into “Restart standby
(forced thermostat OFF)” mode.
After the completion of “Restart standby” mode, the systems will be automatically reset, thus returning to operation prior to the standby.
In the case of PCB connection, the systems will never go into “Restart standby” mode.
Service Checker Type3 Application Edition 135
What Service Checker Can Do SiE30-408
Even tough all settings have been made and the window has been switched, if no data is read and the above error is displayed on the window, the following causes will be supposed.
• “F1 and F2” is not well connected,
• PC board is not properly connected, or
• The Checker is not power ON.
Therefore, check to be sure the above connections or else.
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