Nortek 1RP24K Series, Руководство по установке

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or cooling. After short removed, defrost mode will be
terminated when conditions are met.
• Forced defrost can be maintained for up to 11 minutes by
continuously maintaining the short across the test terminals.
If held for over 11 minutes, the unit will stop and a flashing
‘dF’ will be indicated on the board.
• A continuous display of a fault code will indicate that the
fault is still active.
• A flashing fault code indicates that the fault has been
corrected but remains in memory for troubleshooting
purposes.
• Multiple fault codes are listed in order from the most recent
to the oldest. Only ten codes will be stored in memory.
• Faults will remain in the board memory for seven days
after the last fault is corrected.
• Faults can be cleared from memory by shorting the test
terminal momentarily while there is not a call for heating
or cooling.
Charging the Unit in AC mode
If the outdoor temperature is 65 degrees F or higher:
After completing the refrigerant line connections, leak
checking the system, and evacuating the indoor section
and all line connections (using proper methods), perform
the following steps:
1. Determine the recommended charge addition (if applicable)
for the system being installed. This information is in the
unit’s QRD (Quick Reference Data sheet).
2. Calculate the amount of additional refrigerant needed for
the line set length of the actual installation. This information
is on the first page of the unit’s QRD (Quick Reference
Data sheet).
3. Weigh in the additional charge amounts determined by
step 1 and 2 above.
4. Adjust the charge to match the superheat (for fixed orifice
systems) or subcooling (for TXV systems). There are three
different resources for doing this:
a.) The chargecalculator.com website. This will walk
you through the charging process step by step.
b.) The charging tables on the inside of the outdoor
unit’s electrical box cover panel. These tables
provide superheat targets for fixed orifice systems
and subcooling targets for TXV systems. The system
should be charged so that the measured superheat/
subcooling are within 1 degree F of the target listed
in the table.
For fixed orifice systems:
• If your measured superheat at the suction valve is
LESS THAN the recommended superheat value
in the table then
REMOVE
refrigerant.
• If your measured superheat at the suction valve
is GREATER THAN the recommended superheat
value in the table then ADD refrigerant.
For TXV systems:
• If your measured subcooling at the liquid valve is
LESS THAN
the recommended subcooling value
in the table then ADD refrigerant.
• If your measured subcooling at the liquid valve is
GREATER THAN
the recommended subcooling
value in the table then
REMOVE
refrigerant.
c.) The charging tables in the Supplemental Charging
Information, can be found online in the literature
library. The tables can also be accessed by scanning
the QR code on the unit’s electrical panel. The
pressures listed in these tables are for reference only
and are to be used in troubleshooting a system. The
system should be charged to match the superheat
or subcooling targets as previously noted and not
to match the system pressures. Follow the same
procedure described in 4b above.
If the outdoor temperature is between 35 degrees F and
65 degrees F:
After completing the refrigerant line connections, leak
checking the system, and evacuating the indoor section
and all line connections (using proper methods), perform
the following steps:
1. Determine the recommended charge addition (if applicable)
for the system being installed. This information is in the
unit’s QRD (Quick Reference Data sheet).
2. Calculate the amount of additional refrigerant needed for
the line set length of the actual installation. This information
is on the first page of the unit’s QRD (Quick Reference
Data sheet).
3. Weigh in the additional charge amounts determined by
step 1 and 2 above.
4. Block off the discharge of the outdoor fan. NOTE: One half
of the unit should be covered corner to corner as shown
in Figure 4 .
NOTE : One half of the unit should be covered corner to corner.
Figure 4. Blocked Off Outdoor Fan Discharge
Table 2. Defrost Control Board Status Indicators
STATUS
INDICATOR
STATUS
TYPE
DIAGNOSTIC
DESCRIPTION
C1
Operating Status Cooling, 1st Stage
C2
Operating Status Cooling, 2nd Stage
H1
Operating Status Heating, 1st Stage
H2
Operating Status Heating, 2nd Stage
SC
Operating Status Anti Short Cycle Timer
DF
Operating Status Defrost
_.
Operating Status Power on, no call for operation
01
Fault Pressure switch, low
02
Fault Pressure switch, high
03
Fault Temperature Sensor, Ambient
04
Fault Temperature Sensor, Coil
05
Fault Board
OF
(FLASHING)
Input Error
Forced defrost - test short applied
longer than 11 minutes