Daikin DCM601A51 Commissioning Manual page 122

Problem
Air conditioner Air conditioners continue to work in cool mode
control though the room temperature is lower than the
lower limit set up by the Temperature Limit function.
Air conditioners continue to work in heat mode
though the room temperature is higher than the
upper limit set up by the Temperature Limit function.
Indoor units working in automatic
mode switches to heat (cool) mode
spontaneously.
PPD Cannot connect iTM to PPD
engineering tool.
The pulse port is not displayed on the
PPD setup tool.
When trying to run a trial for the set
up model on the PPD engineering
tool, some of the indoor units are not
automatically recognized.
The calculated power measurement
at the iTM is 1/10 of the detected
kWh.
The calculated power measurement
at the iTM is 10 times the detected
kWh.
The pulse value does not increase
for the displayed management point.
The total pulse value at the iTM does
not match the detected PPD value.
Consumed power has been
distributed though operation time for
the subject indoor unit is "0".
Consumed power is "0" though the
subject indoor unit is operating.
121
Checking method
Check whether the subject indoor
units have Changeover Option.
Check whether the indoor units have
Changeover Option.
Check in the history whether the
Temperature Limit function is running.
Check in the history whether the Auto
Changeover function is running.
C h e c k i n t h e h i s t o r y w h e t h e r
switching between cool and heat
modes is according to the Schedule
function.
Check the history whether switching
between cool and heat modes is according
to the Interlocking Control function.
Check the history whether switching between
cool and heat modes is carried out manually.
When iTM and PC are connected via
hub, check whether they are correctly
connected.
Check that iTM is turned on.
Check whether the network settings
on the PC are in conformity with the
settings described in this manual.
When iTM and PC are connected
directly, check whether they are
connected using the correct cable.
Check whether the Pi management
point is registered in iTM.
Check whether the management
points registered in iTM are
experiencing communication error.
Check whether the subject indoor
units are included in the model
database.
Check whether the pulse rate is "10"
for the management point.
Check whether the pulse rate is "1"
for the management point.
Check the port number to which the
pulse signal wire is connected.
Check whether the detected kWh is
increasing.
Check the history whether a power failure signal
has been input while iTM was being reset.
Check the PPD engineering tool
settings.
Check the PPD engineering tool
settings.
Check the operation mode of the
indoor unit.
Commissioning Manual EM11A021
DCM601A51 intelligent Touch Manager
Cause
The subject indoor units are Check the Temperature Limit settings.
controlled by an upper unit with
Changeover Option.
The subject indoor units are Check the Temperature Limit settings.
controlled by an upper unit with
Changeover Option.
The subject indoor units are controlled Check the Temperature Limit settings.
by the Temperature Limit function.
The subject indoor units are controlled Check the Auto Changeover settings.
by the Auto Changeover function.
Switching between cool and heat modes Check the schedule program.
is controlled by a schedule program.
Switching between cool and heat modes Check the interlocking program.
is controlled by an interlocking program.
Switching between cool and heat
modes is carried out manually.
PC is not connected with iTM. Connect the iTM and PC via hub
using LAN cables.
Cross cables are used as the LAN cables Use straight cables as LAN cable for
connecting the iTM and hub, and PC and hub. connecting the iTM and PC via hub.
The hub is turned off. Turn on the hub.
The iTM is turned off. Turn on the iTM.
The network settings on the PC are Modify the network settings on the
incorrect. PC so that they are in conformity with
the settings described in this manual.
The LAN cable connecting the iTM Connect the iTM and PC using a
and PC is a straight cable. cross cable.
A Firewall is installed on the PC. Disable or delete the Firewall on the PC. (Be
warned that disabling or deleting the firewall may
expose the system to security vulnerabilities)
Pi management point is not registered. Register the Pi management point.
Indoor units are experiencing Find and solve the cause of the
communication error. communication error in the indoor
units.
The subject indoor units are not Check whether the engineering tool
included in the model database. is the latest.
Check with System Support if they
are supported models.
If they are supported models, ask their capacity
and actual state. If they are models that must
be set up manually, set them up manually.
1 kWh/pulse is set up for pulse rate Re-set the pulse rate to 10 kWh/
for the management point instead of pulse.
the intended 10 kWh/pulse.
10 kWh/pulse is set up for pulse rate Re-set the pulse rate to 1 kWh/pulse.
for the management point instead of
the intended 1 kWh/pulse.
The pulse signal wire is not Connect the pulse signal wire to the
connected to the correct Pi port. correct Pi port.
The detected kWh is not increasing. Check whether the kWh meter is
correctly connected.
The pulse value has been partially Give explanation to users.
lost while iTM was being reset.
PPD was set to not distribute the Check the PPD specification. If there is any
consumed power while the air problem, after consulting with the users,
conditioners are stopped. modify settings to distribute the consumed
power while the air conditions are stopped.
PPD was set to distribute the Check the PPD settings. If there is any
consumed power also while the air problem, after consulting with the users,
conditioners are stopped. modify settings to not distribute the consumed
power while the air conditions are stopped.
The operation mode was fan mode. Check the PPD settings.
The thermostat was always OFF Check the PPD settings.
though the air conditioner was
operating in cool or heat mode.
Measure