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Symptom

Condenser set is noisy and

vibrates

"Tipping" noise from Con/set

"Tipping" noise from A/H

Unit does not energize

A/H fan will not run on any

speed

Compressor & cond. fan will

not run

Insufficient cooling

Insufficient heating

Water drips from A/H

TROUBLE SHOOTING

Probable Cause

Check that general pipework is

not touching cabinet, lid, or

chassis

Fan rotor touching inlet ring

Circuit breaker open

Plug not in correctly at back of

S/W box

Plug not in correctly at back of

S/W box

1. Thermostat set too high

2. Fan speed too low

3. Condenser fan not running

4. Unit is low on refrigerant

charge. Generally the temp.

diff. between return air and

discharge air is 11 to 12°C

1. Thermostat set too low

2. If no heating apparent check

8 pin plug at back of switch

box

3. Element faulty

1. Faulty drain installation,

elbow into A/H must not

protrude above grommet

2. Drain hose does not have

continuous downward

gradient

3. Drain hose kinked or blocked

4. Condensate dripping off

flare nut on A/H

Remedy

Gently bend or pull away from

panel etc

Ease motor retaining screws,

and adjust

A/H must be partially removed

from cupb'd. Remove top and

adj. fan ht. via 4 support bolts

(5/16")

Reset circuit breaker

Remove control panel & push in

8 pin plug

Remove control panel & push in

3 pin plug

Adjust more into blue

Switch fan to high

Check free to turn

Check resistor ok

Refrigeration Mech. to adjust

charge

Adjust further into red

Remove control panel and push

in plug

Replace element

Check correct elbow has been

used at A/H see pp. 4

Adjust accordingly

see pp. 4 & fig. 10

Ensure elbow is used at top of

vertical drop.

Wrap bituminous tape around

f/nut to insulate