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O
P
E
R
A
TIO
N
TE
ST
M
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C
O
M
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IN
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A unit that is locked out can be reset by either of the
following two methods:
1. Remove mains power from the unit for at least 3
seconds, then restore power.
2. Use a UC6 service tool service tool to manually reset
the lock-out condition.
Display indication when protection is active -
letter F (flashing)
6.8 Sensor alarm
If the signal of a temperature sensor or pressure
transducer is out of normal operating range the UC6
will generate an alarm. The sensor may be faulty,
disconnected or short circuit.
Display indication temperature sensor alarm -
number 5 (flashing)
Display indication pressure transducer alarm -
number 6 (flashing)
6.9 Loss of RS485 communications alarm
If the UC6 does not receive correct responses from
a device that connects via the RS485 Modbus serial
communications port then an alarm is generated.
Examples of such devices are: a TZT-100 thermostat, a
Carel Power+ inverter.
Display indication for communications fault -
letter C (flashing)
7. TEST MODE
Test mode can only be activated when both compressors are OFF.
To start test mode press and hold down the push button on the lower board between 1 and 5 seconds.
In test mode each output is activated for 5 to 10 seconds, one output at a time. When test mode completes the unit
automatically returns to normal operation.
Display indication during test mode - letter A
8. COMMISSIONING MODE
To start commissioning mode press and hold down the push button on the lower board between 10 and 15 seconds.
In commissioning mode all time delays are reduced to 1/10th their standard value to enable rapid diagnostic testing.
Commissioning mode automatically completes after 30 minutes and the unit will return to normal operation. Cycling mains
power off and on again also ends commissioning mode.
Display indication during commissioning mode - letter C
Summary of Contents for OPA 465RKTG-P
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Page 11: ... 11 OPA 550RKTG P ...
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