SERVICE AND TROUBLESHOOTING
SERVICE HINTS
1.Caution homeowner to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces air flow through the system which shortens equipment service life as well as increasing operating costs.
2.Switching to heating cycle at 75° F or higher outside temperature may cause a nuisance trip of the manual reset high pressure switch.
3.The heat pump wall thermostats perform multiple functions. Be sure that all function switches are correctly set for the desired operating mode before trying to diagnose any reported service problems.
4.Check all power fuses or circuit breakers to be sure that they are the correct rating.
5.Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure tables can be found in Tables 11 and 12 in this manual covering all models on both cooling and heating cycles. It is imperative to match the correct pressure table to the unit by model number.
REFRIGERANT CHARGE
The correct system
TABLE 10
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| 95 Degree F | 82 Degree F | ||||
| Rated |
| OD |
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| OD |
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Model | Airflow | Temperature | Temperature | ||||
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PH1224 | 800 | 56 | - | 56 | 61 | - | 62 |
PH1230 | 1000 | 56 | - | 56 | 58 | - | 60 |
PH1236 | 1100 | 50 | - | 52 | 52 | - | 54 |
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The above suction line temperatures are based upon 80° F dry bulb/67° F wet bulb (50% RH) temperature and rated airflow across the evaporator during cooling cycle.
FAN BLADE SETTINGS
Shown in Figure 12 are the correct fan blade setting dimensions for proper air delivery across the outdoor coil.
Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions in Figure 12 be checked and blade adjusted in or out on the motor shaft accordingly.
FIGURE 12
FAN BLADE SETTING DIMENSIONS
Model | Dimension A |
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PH1224 | 1.00" |
PH1230 | .75" |
PH1236 | .75" |
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SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE
1.Turn on AC power supply to indoor and outdoor units.
2.Turn thermostat blower switch to fan on. The indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.)
3.Turn thermostat blower switch to Auto position. Indoor blower should stop.
4.Set system switch to heat or cool. Adjust thermostat to call for heat or cool. The indoor blower, compressor, and outdoor fan should start.
NOTE: If there is no power to 24 volt transformer, the compressor and outdoor fan motor will not start for 5 minutes. This is because of the compressor short cycle protection.
Manual
