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628 & 698 Models
72
Azure Technical Advice
Procedure For Checking the Compressor/ Cooling Operation
If the Compressor does not run:
1. Check the LED display
For Cold & Ambient models the green (top) LED should always be on and the Yellow (Bottom) when cooling is
called for. If the green is off then check the machines main power supply and the on/off switch.
For the Hot & Cold models the green (top) LED should always be on. If off, check the machines main power
supply and the COLD on/off switch.
2. Switching on the Compressor measure the current draw. No operation, but a high draw indicates a jammed
compressor (contact Azure Technical Support).
3. The wiring loom can be traced and the live supply check periodically moving towards the compressor (if there is
a break at the Cold Thermostat turn the screw clockwise and check whether this closes the circuit. If this
doesn’t even when at max, the thermostat should be replaced. Alternatively, for testing purposes only, the
thermostat could be bridged).
4. Remove the compressor relay cover and carefully remove the relays. If the power has been even recently
connected to the compressor, the solid stat relay will be energised and will need discharging.
5. Check the Compressor resistance readings.
Approx readings could be:
R-C 12ohms
S-C 34ohms
R-S 46 Ohms (sum of both)
N.B. There should always be some variation between compressors. What should be identified is large
discrepancies/unbalanced readings.
Also, especially in the case of large discrepancies/unbalanced readings, check for continuity between any of the
terminals and the compressor casing. A current will indicate a shorted winding (Contact Azure Technical
support).
6. Checking the relays:
Caution: Ensure the larger relay is discharged if recently energised. (This can be discharged by 2MR, 2W resister
in the circuit).
Clearly, the best and surest way to test the relays is to replace them one by one and check the compressor
operation. Otherwise, each relay component can be basically tested using a meter
The Solid State Relay should read approx
3-6 closed circuit
3 ≈ 36 Ω (Ohms)
The Klichson (overload) should read approx
≈ 1.7Ω (Ohms)
7. Ensure the terminals are clean and good contact is made.
S
C
R
Summary of Contents for 628
Page 1: ...INSTALLATION OPERATION GUIDE 628 698 MODELS ...
Page 3: ...Section1 Technical Manual ...
Page 7: ...Section 2 Technical Manual ...
Page 19: ...Section 3 Technical Manual ...
Page 23: ...Technical Manual Section 4 ...
Page 35: ...Section5 Technical Manual ...
Page 40: ...628 698 Models 40 Borg Overstrom 628 698 Cold Ambient Ambient Electrical Diagram ...
Page 41: ...628 698 Models 41 Borg Overstrom 628 698 Hot Cold Production series No 10 ...
Page 42: ...Technical Manual Section6 ...
Page 47: ...Section7 Technical Manual ...
Page 58: ...Technical Manual Section8 ...
Page 75: ...Notes ...
Page 76: ...Notes ...
Page 77: ...Notes ...
Page 78: ...Notes ...
Page 79: ...Notes ...
Page 80: ...Notes ...