Bard Q42H1 Specifications download pdf (Page 36)

Manual 2100-519

Page 36 of 42

TROUBLESHOOTING

SOLID STATE HEAT PUMP CONTROL

TROUBLESHOOTING PROCEDURE

1. NOTE: A thorough understanding of the defrost

cycle sequence is essential. Review that section

earlier in this manual prior to troubleshooting the

control. Turn on AC power supply to unit.

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 to “auto” position. Indoor

blower should stop. NOTE: Many models have a

1-minute blower time delay on “off” command;

wait for this to time-out.

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 was 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.

CODES FUNCTION

Slow Blink Normal Operation

Fast Blink Compressor Time Delay

1 Blink Low Pressure Switch Failure

2 Blink High Pressure Switch Failure

3 Blink Defrost Mode Active

TABLE 5

TROUBLESHOOTING

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1 2 ... 31 32 33 34 35 36 37 38 39 40 41 42

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Bard Q42H1 Specifications Page 36

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