York YZ MODEL A, Руководство по эксплуатации и обслуживанию

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JOHNSON CONTROLS
128
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 5 - MAINTENANCE
AUTOMATIC BATTERY HEALTH TEST –
DURING SHUTDOWN
For periodic maintenance or to diagnose battery faults
or warnings, a battery health test can be performed.
This test is initiated from the Power Panel screen of
the Optiview panel to monitor battery voltage while
under a known load. This will ensure that the battery
has enough capacity left to withstand a power failure
event. The test is available though operator access level
or higher.
At the keypad, log in at Operator access level using ac-
cess level code 9 6 7 5 or a higher level.
Navigate to Compressor – Power Panel screen.
On the Power Panel screen, the “Start Battery Test”
button is shown and the function available when all of
the following are true:
• Access Level is Operator or higher
• Chiller State is Stopped
• Safety Stop push-button is depressed
• The Local Run/Stop is set to Stop
When the “Start Battery Test” button is pressed the Bat-
tery Health Test is initiated. When the Battery Health
Test is in progress, this button changes to a “Cancel
Battery Test” button to cancel the active Battery Health
Test in progress if needed. The test proceeds as follows:
The panel instructs “UPS Battery Test - Disconnect
3-phase line power to the chiller now”. At that time, re-
move three-phase power to the chiller. Once the power
is removed, the UPS becomes available for a limit of
10 minutes for performance of the test.
When the panel detects control voltage is low and UPS
is in Inverter mode due to loss of the line power, the
panel displays “UPS Battery Test - Evaluating Bat-
tery”. The MBC is then commanded to Levitation. Af-
ter the MBC reports to Optiview that it is in Levitation
mode, the battery voltage is monitored for the next 60
seconds.
The following constitute a fail result:
• If Battery Voltage drops to less than the Inverter
Low Battery Voltage Threshold (Default 11.0 V)
(UPS – Inverter Low Battery Voltage fault thresh-
old) the test fails and ends
• If the test takes longer than 75 seconds the test
fails and ends
• If the UPS shuts down (OptiView will lose power)
due to voltage, fuses, disconnect, or any other rea-
son the test fails and the Optiview displays a fault
on next power up stating that the battery health
test has failed. This fault can be cleared by run-
ning a successful battery health test
If the “UPS – Inverter Low Battery Voltage” fault is
not set by the end of the 60 second test (Battery Volt-
age stays above the threshold), the battery evaluation is
considered good.
Next, the control ceases MBC levitation. If this step
takes longer than 15 seconds, the test fails and ends.
Then the panel instructs “Reconnect 3-phase line
power to the chiller now”. At that time, reapply three-
phase power to the chiller. The full test successfully
ends when Optiview detects the control voltage has
returned.
If the 10 minute power loss holdup timer runs out (Op-
tiView power will be lost due to turning off UPS In-
verter) before the test completes and power is restored
the test is considered failed.
“UPS Battery Health Test Successful” is displayed for
10 seconds when the test passes.
“UPS Battery Health Test Failed – Step X” (Where X
is the step that failed) is displayed when the test fails.
It remains while the “Warning – UPS – Battery Test
Failed” warning is active. It and the warning will be
cleared when a Battery Health Test completes success-
fully.
For a fail, the following steps may be indicated as the
fail point:
• Step 2 is when the Optiview is waiting to sense
line power removed – typically the user has taken
too long and exceeded 10 minute test time
• Step 3 is during the 60 second battery voltage
monitoring under Levitation load – typically
would be a bad battery
• Step 4 is after completion of the 60 second moni-
toring and waiting for successful automatic de-
levitation – would indicate some unplanned fail-
ure of the control or communication
• Step 5 is waiting to sense line power restored –
typically the user has taken too long and exceeded
10 minute test time